Back to the unitTip: in the print dialog choose “Save as PDF”.
Teaching pack · Year 2 Chemical sciencesseegongsik /au

Changing Materials: a full term of science

Ten ready-to-teach lessons for Year 2 Chemical sciences. Print this pack and the term is prepared: every lesson comes with a step-by-step plan, the questions to ask, student worksheets, cut-out cards, an assessment kit and every answer.

AC9S2U03
recognise that materials can be changed physically without changing their material composition and explore the effect of different actions on materials including bending, twisting, stretching and breaking into smaller pieces

Start here: five minutes to Monday

  1. Skim the term at a glance on the next page.
  2. Print the lesson you need. Each lesson is three A4 sheets: plan, worksheet, cards or tickets.
  3. Gather the few everyday items under “You need” on the plan. Nothing needs a science cupboard.
  4. Open the free interactive unit on your board or projector. Every plan tells you which picture to show and when.
  5. Teach straight from the plan. Timings, talk prompts, misconceptions and answers are all on the one page.

No science background needed

This pack is written for the busy generalist teacher. Each plan explains the science idea in plain words, lists the misconceptions children bring, and gives model answers, so you can walk in and teach it even if chemistry was never your subject.

Two ways to run each lesson

Every lesson works as one 60-minute block, or as two 30-minute sessions. The split point is marked in every plan. Ten lessons fill a weekly science slot for a whole term, or up to twenty shorter sessions if your timetable runs small blocks.

On the board
This pack is the printable half of a free interactive unit. The on-screen half has five interactive pictures (bend a stick, stretch and squash dough, twist a towel, break a biscuit, and the big idea) plus a self-check quiz you can run as a class game in Lesson 10.
seegongsik.com/au/y2/chemical/AC9S2U03
Aligned to the Australian Curriculum V9 (AC9S2U03). This pack is original material from seegongsik, independently produced and not endorsed by ACARA. Curriculum content descriptors are (c) ACARA, licensed under CC BY 4.0. Free to print and use in class.
Term at a glance10 lessons

The term at a glance

One lesson a week for a term. Each lesson stands on the ones before it, so run them in order where you can.

#LessonChildren learn and doYou need (in short)
1Material detectivesName what things are made of and sort objects by materialA tray of classroom objects, sorting mats
2Bend itTest which things bend, and which spring backStraws, pipe cleaners, craft sticks
3Stretch itStretch materials and measure the stretch with paper clipsRubber bands, dough, paper clips
4Twist itTwist cloth and paper, and twist strips into ropeSmall cloths, paper strips
5Break it into piecesBreak and tear things, and see the pieces are the same stuffDry biscuits, scrap paper
6Can we change it back?Sort changes we can undo from changes we cannotSix stations of everyday materials
7The dough shape factorySquash, roll and flatten dough to fill customer ordersModelling dough, order cards
8The strong paper testFold or roll paper to make it stronger, and test it fairlyScrap paper, small books
9People who change materialsMatch jobs to the actions they use every dayJob cards from this pack
10Show what we knowMake something by changing materials, then the final checkA makers’ table of leftovers

How the sequence builds

Lesson 1 names materials. Lessons 2 to 5 work through the four actions in the curriculum: bend, stretch, twist, break. Lessons 6 to 8 deepen the idea: some changes undo, the amount of stuff stays the same, and a new shape can mean new strength. Lesson 9 connects the idea to people’s jobs, and Lesson 10 is the making task and final check.

Curriculum links (Australian Curriculum V9)

The whole term teaches the Science Understanding descriptor AC9S2U03 quoted on the cover. The lessons also work these Science Inquiry and Human Endeavour descriptors:

AC9S2I01pose questions to explore observed simple patterns and relationships and make predictions based on experiences
AC9S2I02suggest and follow safe procedures to investigate questions and test predictions
AC9S2I03make and record observations, including informal measurements, using digital tools as appropriate
AC9S2I04sort and order data and information and represent patterns, including with provided tables and visual or physical models
AC9S2I05compare observations with predictions and others’ observations, consider if investigations are fair and identify further questions with guidance
AC9S2I06write and create texts to communicate observations, findings and ideas, using everyday and scientific vocabulary
AC9S2H01describe how people use science in their daily lives, including using patterns to make scientific predictions

Assessment in this pack

Get ready · Materials for the termOne shopping trip

Materials for the whole term

One gathering session covers all ten lessons. Everything on this page is an everyday item; nothing needs a science cupboard.

LessonYou need
1a tray of small objects (wooden peg or block, metal spoon, plastic cup, fabric scrap, paper, rubber band), five sorting mats
2drinking straws, pipe cleaners, craft sticks, a plastic ruler, strips of card
3rubber bands, modelling dough, a clean sock or fabric scrap, paper strips, paper clips (a chain for measuring)
4small cloths or tea towels, strips of newspaper or tissue paper, pipe cleaners
5dry biscuits or crackers (allergy check first; dry spaghetti swaps in), scrap paper, a cloth, a magnifying glass if you have one
6a straw, a rubber band, modelling dough, aluminium foil squares, paper, plus a torn strip and a broken biscuit in a clear bag for the teacher table
7a same-sized ball of modelling dough per child (one colour each), paper plates or mats
8scrap paper (three sheets per pair), small identical books or blocks, two equal book stacks, a little sticky tape
9nothing new: the job cards and word wall cards from this pack; optional bread roll, knitted scarf, paper fan
10the term’s leftovers on a makers’ table: dough, paper, foil, pipe cleaners, fabric scraps, paper strips

The one-trip list

Safety in one look

Get ready · Assessment kitRubric + checklist

Assessment without extra work

The term assesses itself. Every lesson plan ends with answers and look-fors, and Lesson 10 is the summative pair: the making task plus the check sheet. This sheet is the place to jot down what you notice along the way.

The three levels

IdeaWorking towardsAt standardBeyond
Naming materialsnames one or two materials with helpnames wood, metal, plastic, fabric, papernames extras like rubber or glass unprompted
Describing actionsshows an action but struggles to name itnames bend, twist, stretch, break for what they didpicks the right action for a new example
The big ideasays the thing is “different now”says the shape changed but the material stayed the sameexplains it unprompted about someone else’s object
Changing backsorts with helpsorts changes that undo from those that do notreasons about tricky cases like the foil or the crease

Class observation checklist

NameNames materialsNames actionsSame materialUndo sortScience words

A tick a lesson is plenty; the Lesson 10 check sheet fills the gaps.

Word wall (cut out)

Word wall cards

Cut out the cards and build the wall as the words arrive. Lesson 1 starts the wall with material and shape; add the action words as the lessons land.

material

the stuff a thing is made of

shape

the form a thing has

bend

make it curve

twist

turn the ends opposite ways

stretch

pull it longer

break

snap it into pieces

tear

pull paper or cloth apart

fold

bend flat along a line

roll

turn it over and over into a tube or ball

squash

press it flat

change

make it different

change back

return it to how it was

A note home

Dear families

This term in science, Year 2 becomes a class of material detectives. We bend, twist, stretch and break everyday things such as paper, dough, cloth and foil, and we look closely at what happens.

Every investigation points to one big idea: the shape or the size changes, but the material stays the same. A squashed ball of dough is still dough; a folded sheet of paper is still paper. Your child will practise saying this in their own words all term.

Try this at home

What to ask your scientist

A small safety note: we check food allergies at school before any food investigations. At home, an adult helps with anything stiff or snappy.

Warm regards,

The Year 2 team

Printed from the free seegongsik Changing Materials teaching pack · seegongsik.com/au/y2/chemical/AC9S2U03/pack

Lesson 1 · Teacher planLesson 1 of 10

Material detectives

Children learn that a material is what a thing is made of, and sort everyday objects by material. This lesson lays the ground for the term: you cannot talk about changing materials until the class can name them.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minMystery bag
Pass one object around inside a cloth bag.

Ask: Without looking, what do you think it is made of? How can you tell with just your fingers?

10 minName the stuff
Hold up each object from the tray. Sort the words: the spoon is the object, metal is the material.

Ask: The spoon is the thing. What is the stuff it is made of?

15 minSort it out
Tables sort the cut-out cards, and any real objects you trust them with, onto the five material mats.
15 minMaterial hunt
Children hunt the classroom and record on the worksheet: draw or write one find for each material.
10 minCircle up
Re-sort the two tricky cards together, then children finish the sentence at the bottom of the worksheet.

Ask: The pencil went between two mats. Why?

Running two half-sessions instead? End Session A after Sort it out. Start Session B by re-sorting two cards from memory, then go on to the Material hunt.

On the board
Open the interactive unit and leave the header on screen while children sort: it shows the unit name and the big idea. As a teaser for next week, press “Bend it” in the first picture: a stick changes shape without becoming new stuff.
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Make it easier, make it bigger

Answers and look-fors

Lesson 1 · Worksheet

Material hunt

NameClassDate

Be a material detective. Find things in your classroom. Draw or write one thing made of each material.

MaterialI found this (draw or write)
wood
metal
plastic
fabric
paper
A material is
My favourite find is made of
Lesson 1 · Sorting cards (cut out)

What is it made of?

Cut out the cards. Sort them onto your material mats. Two cards are tricky on purpose.

wooden peg

Which mat does it go on?

metal spoon

Which mat does it go on?

plastic cup

Which mat does it go on?

cotton sock

Which mat does it go on?

newspaper

Which mat does it go on?

wooden block

Which mat does it go on?

foil tray

Which mat does it go on?

plastic ruler

Which mat does it go on?

woolly jumper

Which mat does it go on?

cardboard box

Which mat does it go on?

rubber band

Which mat does it go on?

pencil

Which mat does it go on?

Teacher note: the rubber band and the pencil are the tricky pair. The rubber band wants a new mat (rubber); the pencil belongs on more than one mat at once.

Lesson 2 · Teacher planLesson 2 of 10

Bend it

Children bend five everyday objects and discover that bending turns a shape into a curve, that many things spring back, and that bending never makes new stuff. This is the first of the four action lessons, so the routine learnt here (guess, test, record) carries straight through to stretching, twisting and breaking.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minOne straw
Hold up a single straw and take guesses before you touch it.

Ask: If I push the two ends of this straw together, what will it do? Will it stay that way when I let go?

10 minAt the board
Show the on-screen stick (see the board note below). Press the buttons and let the class call the shape each time: straight, curved, straight again.

Ask: The stick is bent into a curve. What is it made of now?

10 minGuess first
Pairs fill in the whole My guess column on the worksheet before they touch anything. Guessing first and then testing is how scientists work, and it is the habit this term is built on.
20 minThe bend test
Pairs bend each of the five objects gently and tick what happened: did it bend, and did it spring back. Demonstrate the gentle craft stick bend yourself before anyone starts.
10 minCircle up
Sort the results out loud: which things sprang back, which stayed bent. Children finish the sentence at the bottom of the worksheet, then answer an exit ticket at the door.

Ask: The pipe cleaner stayed bent. Is it still a pipe cleaner?

Running two half-sessions instead? End Session A after Guess first, with the guesses filled in. Start Session B by re-bending one straw together, then go on to the bend test.

On the board
Open the interactive unit and scroll to the first picture, “Bend a stick”. Press “Bend it” and let children call out the shape, then press “Let it go” and let them call it again. The caption under the picture says the line you want the class to hear: same stick, same wood, nothing new.
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Keep it safe

Bend gently is the rule of the day: snapping things on purpose is Lesson 5, not today. Craft sticks can splinter if they are forced, so demonstrate the gentle bend yourself before pairs start, and ask children to stop at the first creak.

Make it easier, make it bigger

Answers and look-fors

Lesson 2 · Worksheet

The bend test

NameClassDate

Guess first! Tick one box in the guess column for every thing. Then bend each thing gently and tick what really happened.

Thing to bendMy guess: will it bend?Did it bend?Did it spring back?
strawYes     No Yes     No Yes     No
pipe cleanerYes     No Yes     No Yes     No
craft stick (gently!)Yes     No Yes     No Yes     No
plastic rulerYes     No Yes     No Yes     No
strip of cardYes     No Yes     No Yes     No
When I bend something, the shape changes but the material
Lesson 2 · Exit tickets (cut out)

Exit tickets

Cut along the dashed lines to make four tickets. Each child answers one on the way out the door.

Exit ticket
Name

1. Circle one. Bending changes the ( shape / stuff it is made of ).

2. Draw something you bent today.

Exit ticket
Name

1. Circle one. Bending changes the ( shape / stuff it is made of ).

2. Draw something you bent today.

Exit ticket
Name

1. Circle one. Bending changes the ( shape / stuff it is made of ).

2. Draw something you bent today.

Exit ticket
Name

1. Circle one. Bending changes the ( shape / stuff it is made of ).

2. Draw something you bent today.

Teacher note: question 1 is shape. Collect the tickets at the door and sort them into two piles for a ten-second check of the class.

Lesson 3 · Teacher planLesson 3 of 10

Stretch it

Children stretch four everyday things and find that some stretch a lot, some hardly at all, and every one of them is still the same material afterwards. This is also the first measuring lesson of the term: counting length in paper clips turns “it got longer” into a number two pairs can compare.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minHow long is my band?
Lay a rubber band at rest beside a chain of paper clips and count its length together.

Ask: My band is three paper clips long. What could we do to make that number bigger?

10 minOn the board
Show the dough picture from the unit (see the board box below): a round lump becomes stretched tall.

Ask: What changed when I pressed Stretch tall? What stayed exactly the same?

20 minStretch and measure
Pairs measure each thing at rest, then gently stretched: rubber band, dough snake, sock, paper strip. One partner holds, the other counts paper clips, then they swap.
10 minRecord
Children write both numbers in the worksheet table, circle how stretchy each thing was, and answer the rubber band question at the bottom.
10 minCircle up
Compare results across pairs: which thing stretched the most? Do our numbers agree?

Ask: One pair got five clips for the sock and another got three. What could make the numbers different?

Running two half-sessions instead? End Session A after Stretch and measure. Start Session B by re-measuring the rubber band at rest, then go on to Record.

On the board
Open the interactive unit and scroll to “Stretch and squash dough”. Press “Round lump”, then “Stretch tall”. Ask what changed (the shape: taller and thinner) and what did not (the dough itself, and how much of it there is).
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Keep it safe

Show the grip before any bands go out: stretch low over the table, along it, never toward a face, and no flicking. Stop pulling the paper strip before it tears. Tearing things into pieces is Lesson 5, so today the strip must survive.

Make it easier, make it bigger

Answers and look-fors

Lesson 3 · Worksheet

How far does it stretch?

NameClassDate

Stretch each thing gently. Measure it with paper clips before and after. Write your numbers, then circle how stretchy it is.

ThingAt rest (paper clips)Stretched (paper clips)Stretchy? (circle one)
rubber banda lot  ·  a little  ·  hardly
dough snakea lot  ·  a little  ·  hardly
socka lot  ·  a little  ·  hardly
paper stripa lot  ·  a little  ·  hardly
The rubber band got longer. Is it still rubber?Yes     No
How do you know?
Lesson 3 · Exit tickets (cut out)

Exit tickets

Cut along the dashed lines. One ticket per child on the way out the door.

Exit ticket
Name

1. Circle one. Stretching makes it

longer   /   a new material

2. Which thing stretched the most today? Write or draw it.

Exit ticket
Name

1. Circle one. Stretching makes it

longer   /   a new material

2. Which thing stretched the most today? Write or draw it.

Exit ticket
Name

1. Circle one. Stretching makes it

longer   /   a new material

2. Which thing stretched the most today? Write or draw it.

Exit ticket
Name

1. Circle one. Stretching makes it

longer   /   a new material

2. Which thing stretched the most today? Write or draw it.

Teacher note: a circled “longer” plus any stretchy thing named or drawn meets the goal. A circled “a new material” is your revisit list for Lesson 4.

Lesson 4 · Teacher planLesson 4 of 10

Twist it

Children twist cloth, then wind paper strips into a rope and give it a gentle tug. Twisting is the third action of the term, and it carries a surprise: a wound-up material can look brand new and even work better, yet the rope is still nothing but paper. That surprise seeds Lesson 8, where the class chooses shapes for jobs.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minWring it out
Everyone stands and wrings out an imaginary wet towel: two fists, turning opposite ways. That is the move the whole lesson runs on.
10 minOn the board
Show the towel picture from the unit (see the board box below) and walk through the three buttons while children mime each press.

Ask: The stripes are leaning further and further over. Is this a new towel now, or the same one wound up?

10 minTwist a real towel
Pairs hold one end each and twist. Look closely at the wound-up shape, then untwist and watch it lie flat again. Twist, look, untwist, swap jobs.
20 minMake a paper rope
Tables follow the six step cards: twist each strip tight, then wind the pair around each other the other way. Finish with the tug test on card 5, first on a single flat strip, then on the rope.

Ask: Your rope held the tug and one flat strip did not. What is different about them? What is the same?

10 minRecord and circle up
Children draw their cloth before and after on the worksheet and answer the questions. Then circle up with one rope in the middle.

Ask: Our rope looks new and works better than one strip. So what is it made of?

Running two half-sessions instead? End Session A after Twist a real towel. Start Session B by pressing Twist and Twist more on the board picture again, then go on to Make a paper rope.

On the board
Open the interactive unit and scroll to “Twist a towel”. Press “Flat”, then “Twist”, then “Twist more”, and have children mime each press with their fists. Ask what the leaning stripes show (the towel winding around itself) and what never changes (one towel, same cloth).
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Make it easier, make it bigger

Answers and look-fors

Lesson 4 · Worksheet

Twist it

NameClassDate

Twist your cloth and look hard at it. Draw it before and after. Then make your paper rope and answer the questions.

My cloth before
My cloth after twisting
After twisting, is it still the same cloth?Yes     No
Our paper rope held a gentle tug.Yes     No
Our rope is made of
Lesson 4 · Rope-making step cards (cut out)

Make a paper rope

Cut out the cards and follow them in order. Card 6 is for rope-makers who want more.

1Take two strips

Take two paper strips and lay them flat on the table.

2Twist each strip

Twist each strip up tight, like a tight spring. Keep twisting!

3Hold them together

Hold both twisted strips together at one end so they cannot unwind.

4Wind them together

Twist the two strips around each other the OTHER way.

5Tug test

Gently tug the ends. Did your rope hold?

6Challenge

Make a longer rope, or a thicker rope with three strips.

Teacher note: one set per table. Card 4 is the secret: winding the pair the opposite way locks the first twists in, so the rope cannot unwind itself.

Lesson 5 · Teacher planLesson 5 of 10

Break it into pieces

Children break a biscuit and tear paper into smaller and smaller pieces, and find that every piece, right down to the crumbs, is still the same material. This is the last of the four action lessons and the boldest claim of the term: unlike a bent stick, the pieces will not go back together, yet nothing new was made.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minSnap guess
Hold up one whole biscuit and collect predictions before anything snaps.

Ask: If I snap this biscuit in half, what will I have?

10 minOn the board
Show the biscuit picture from the unit (see the board box below) and break it step by step, counting the pieces together each time.

Ask: There are four pieces now. Is there more biscuit than before?

20 minBreak and tear
Tables cover their biscuit with the cloth and snap it into halves, then quarters, then press gently for crumbs. Beside it, they tear a paper strip in half again and again. Pass the magnifier around the crumb pile.

Ask: Look right up close. Are the crumbs still biscuit? How can you tell?

10 minRecord
Children draw the biscuit whole, in pieces and as tiny bits on the worksheet, tick whether it is the same material at each step, and finish the crumb sentence.
10 minCircle up
Try sliding the pieces back into a biscuit shape: they will not join, but every piece is still biscuit. Say the idea together: breaking made it smaller, not different. Exit tickets on the way out.

Running two half-sessions instead? End Session A after Break and tear, and keep each table’s crumbs in a labelled cup. Start Session B by tipping the crumbs out and asking what they are made of, then go on to Record.

On the board
Open the interactive unit and scroll to “Break a biscuit”. Press “Break it” step by step, twice, and count the pieces together: one, then two, then four. Ask what the pieces are made of, then press “Start whole” and point out that the screen can undo the break, but our real biscuit cannot.
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Keep it safe

Check food allergies before any biscuit comes out; dry spaghetti snaps just as well. Nothing goes in mouths today, not even at the end. Break only soft, crumbly things, and with care: this is a looking lesson, not a smashing lesson. Everyone washes hands after the tidy-up.

Make it easier, make it bigger

Answers and look-fors

Lesson 5 · Worksheet

Smaller and smaller

NameClassDate

Break your biscuit under the cloth, a little at a time. Draw what you see at each step. Then tick: is it still the same material?

Whole
draw it
Same material?
Yes     No
Pieces
draw it
Same material?
Yes     No
Tiny bits
draw it
Same material?
Yes     No
Finish the sentence. The crumbs are still made of
Lesson 5 · Exit tickets (cut out)

Exit tickets

Cut along the dashed lines. One ticket per child on the way out the door.

Exit ticket
Name

1. You snap a biscuit in half. Did you make new stuff?

Yes     No

2. Circle one. The pieces are

smaller   /   a different material

Exit ticket
Name

1. You snap a biscuit in half. Did you make new stuff?

Yes     No

2. Circle one. The pieces are

smaller   /   a different material

Exit ticket
Name

1. You snap a biscuit in half. Did you make new stuff?

Yes     No

2. Circle one. The pieces are

smaller   /   a different material

Exit ticket
Name

1. You snap a biscuit in half. Did you make new stuff?

Yes     No

2. Circle one. The pieces are

smaller   /   a different material

Teacher note: no for question 1 and a circled “smaller” meets the goal. A yes for question 1 means the child thinks breaking makes new stuff; revisit with the crumbs and the magnifier at the start of the next lesson.

Lesson 6 · Teacher planLesson 6 of 10

Can we change it back?

Children take the four actions around six quick stations and ask a new question of each: can we undo it? Some changes go back easily and some do not, and even when a change will not undo, the material is still the same: the scrunched foil is still foil. This is the thinking lesson of the term, sitting right after the four action lessons so children can argue about things they already know.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minFour actions
Warm up by miming the four actions from the last four lessons together: bend, stretch, twist, break.

Ask: We have bent, stretched, twisted and broken things. Which of those do you think we could undo?

10 minOn the board
Show the last picture from the unit (see the board box below) and press each action in turn while children watch the tag that never changes.

Ask: The shape keeps changing. What is the tag on the right doing?

20 minStation circuit
Table groups rotate through the six stations, about three minutes each. At every station: do the action, try to undo it, then talk about whether it went back. Station 6 is the teacher table and is looking only.
10 minRecord sort
Back at desks, children write or draw each station on the worksheet, in the box where it belongs: I can change it back, or I cannot easily change it back.
10 minCircle up
Argue the tricky ones together: the foil ball and the paper crease. Then everyone finishes the sentence at the bottom of the worksheet.

Ask: The foil will not go smooth again. Is it still foil? How do you know?

Running two half-sessions instead? End Session A after the station circuit and leave the stations standing. Start Session B by revisiting one station that went back and one that did not, then go on to the record sort.

On the board
Open the interactive unit and scroll to “The shape changed, the material did not”. Press “Bent”, “Stretched”, “Twisted” and “Broken” in turn. The shape on the left keeps changing; the tag on the right never does. Ask which of the four shapes on screen the class thinks they could change back.
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Keep it safe

Rubber bands are stretched gently with two hands and never let fly. The biscuit stays sealed in its bag all lesson: station 6 is looking only, and nothing goes in mouths.

Make it easier, make it bigger

Answers and look-fors

Lesson 6 · Worksheet

Can I undo it?

NameClassDate

Go to each station. Do the action, then try to change it back. Write or draw each thing in the best box.

I can change it back
write or draw
I cannot easily change it back
write or draw
Finish the sentence. Even when I cannot change it back, the material is still
Lesson 6 · Station cards (cut out)

Can you change it back?

Cut out the cards and stand one at each station. At every station: do what the card says, try to undo it, then talk about what happened.

1Bend the straw

Bend the straw in the middle. Then try to make it straight again.

Can you change it back?

2Stretch the band

Stretch the rubber band wide with two hands. Then let it go gently.

Can you change it back?

3Squash the dough

Squash the dough flat. Then roll it back into a ball.

Can you change it back?

4Scrunch the foil

Scrunch the foil into a ball. Then try to smooth it flat.

Can you change it back?

5Fold the paper

Fold the paper in half. Then open it up. What do you see?

Can you change it back?

6Teacher table

Look at the torn strip and the broken biscuit in the bag. Do not touch. Can anyone undo these?

Can you change it back?

Teacher note: stations 1 to 5 are hands-on; station 6 is your table and is looking only. About three minutes a station keeps the circuit inside twenty minutes.

Lesson 7 · Teacher planLesson 7 of 10

The dough shape factory

Children run a shape factory: order cards ask for snakes, pancakes and bowls, and one ball of modelling dough fills every order. The four action lessons showed that the material stays the same; today the class meets the harder twin idea, that the amount stays the same too. A long snake looks like more dough than a ball, and believing your eyes here is the classic Year 2 stumble, so every order ends with the same check.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minRoll and pass
Every child rolls their ball smooth and passes it one place to the left, feels the new ball, and passes it back. All the balls started the same size; hands are the first measuring tool today. Balls stay on plates from here on.
10 minOn the board
Show the dough picture from the unit (see the board box below) and press all three buttons in turn.

Ask: Is there more dough when it is tall?

20 minFactory time
The factory opens. Children take an order card, make the shape on their plate, and answer the factory question out loud before moving on. Then they squash the dough back into a ball and take the next card.

Ask at every order: Did your dough get more, less, or stay the same?

10 minRecord
Children draw three shapes they made on the worksheet, tick Same dough? for each, circle the ending of the squash sentence, and finish the I know because line.
10 minCircle up
The face-off: roll the longest snake in the room and lay it beside one untouched ball. Vote: more dough, less, or the same. Then squash the snake back into a ball and stand the two balls side by side.

Ask: The snake looked so much bigger. Where would the extra dough have come from?

Running two half-sessions instead? End Session A after Factory time, and park each ball on its named plate. Start Session B by holding up one ball and asking whether any dough sneaked in or out overnight, then go on to Record.

On the board
Open the interactive unit and scroll to “Stretch and squash dough”. Press all three buttons in turn: “Round lump”, “Stretch tall”, “Squash flat”. At the tall one, ask whether there is more dough now, and let the class argue before you press “Round lump” again: the same lump, back again.
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Make it easier, make it bigger

Answers and look-fors

Lesson 7 · Worksheet

The shape factory

NameClassDate

Fill the orders with your dough. Draw three shapes you made, one in each box. Then tick: is it still the same dough?

Order 1
draw your shape
Same dough?
Yes     No
Order 2
draw your shape
Same dough?
Yes     No
Order 3
draw your shape
Same dough?
Yes     No
Circle one. When I squash the dough, the amount of dough

goes up   /   goes down   /   stays the same

I know because
Lesson 7 · Order cards (cut out)

Factory orders

Cut out the cards and put them face down in the middle of the table. Take the top card, fill the order, answer the question, then squash your dough back into a ball and take the next one.

1A long thin snake

Roll your dough into the longest, thinnest snake you can make.

When you finish: is it still the same dough?

2A flat round pancake

Press your dough flat into a round pancake.

When you finish: is it still the same dough?

3A perfect ball

Roll your dough round and round until it is a smooth ball.

When you finish: is it still the same dough?

4A little bowl

Push your thumb into the middle and pinch up the sides.

When you finish: is it still the same dough?

5A curly snail

Roll a snake first, then curl it round and round into a snail.

When you finish: is it still the same dough?

6Your own order

Ask a friend what shape they would like. Make it for them.

When you finish: is it still the same dough?

Teacher note: order 6 keeps fast finishers busy for as long as you need. Keep every ball one colour today; two colours squashed together will not come apart again, and the class set is spoiled for next time.

Lesson 8 · Teacher planLesson 8 of 10

The strong paper test

Children take one floppy sheet of paper and make it strong. Flat across a gap it flops under a single book; folded like a fan or rolled into a tube, the very same sheet holds a real stack. Seven lessons have said the shape changes, the material stays the same; today shows why that matters, because a new shape can do a new job. And since the paper is the same all lesson, this is also the first proper fair test of the term: change one thing only, and that one thing is the shape.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minCan it hold a book?
Lay one flat sheet across the two book stacks and rest a small book in the middle. It flops straight onto the table. Leave the sad flat bridge where everyone can see it.

Ask: The paper could not hold even one book. Is it bad paper, or a bad shape?

10 minAt the board
Show the last picture from the unit (see the board box below) and flick through the four buttons while children watch the tag that never changes.

Ask: If the material always stays the same, what could a new shape do for our floppy paper?

20 minBuild and load
Pairs fold one sheet into a fan, back and forwards like a zigzag, and roll one sheet into a tube held with a small bit of sticky tape. Guess first on the worksheet, then bridge each shape across the stacks and load books one at a time, counting until the bridge sinks.
10 minFair-test talk
Children write their counts, then finish the fair test box on the worksheet.

Ask: What did we keep the same all lesson? What is the one thing we changed?

10 minCircle up
Unroll a tube so everyone sees the same floppy sheet come back. Then tear the edge of an old cardboard box: the wavy paper hiding inside its walls is a fan bridge doing a real job.

Ask: Where else has someone seen folded or wavy paper working hard?

Running two half-sessions instead? End Session A after Build and load, with the counts written on the worksheets. Start Session B by bridging one flat sheet and one fan again as a reminder, then go on to the fair-test talk.

On the board
Open the interactive unit and scroll to the last picture, “The shape changed, the material did not”. Press the four buttons in turn: “Bent”, “Stretched”, “Twisted”, “Broken”. The shape on the left keeps changing and the tag on the right never does. Then say: all term the shape changed and the material did not. Today we make the shape do the work.
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Make it easier, make it bigger

Answers and look-fors

Lesson 8 · Worksheet

Paper power

NameClassDate

Make three paper bridges: flat, folded like a fan, rolled into a tube. Guess first! Write how many books you think each one will hold. Then test it and write what really happened.

Paper shapeMy guess: books it will holdBooks it held
flat sheet
folded like a fan
rolled into a tube
Our fair test
To be fair we kept the same
We only changed the
The strongest shape was
Is it still made of paper?   Yes     No
Lesson 8 · Exit tickets (cut out)

Exit tickets

Cut along the dashed lines to make four tickets. Each child answers one on the way out the door.

Exit ticket
Name

1. Circle one. Folding the paper changed its ( shape / material ).

2. Draw the strongest paper shape you made.

Exit ticket
Name

1. Circle one. Folding the paper changed its ( shape / material ).

2. Draw the strongest paper shape you made.

Exit ticket
Name

1. Circle one. Folding the paper changed its ( shape / material ).

2. Draw the strongest paper shape you made.

Exit ticket
Name

1. Circle one. Folding the paper changed its ( shape / material ).

2. Draw the strongest paper shape you made.

Teacher note: question 1 is shape. Collect the tickets at the door and sort them into two piles for a ten-second check of the class.

Lesson 9 · Teacher planLesson 9 of 10

People who change materials

Children have spent the term bending, stretching, twisting and breaking with their own hands. Today they look up and find grown-ups doing the very same actions all day for work: the baker stretches and folds dough, the potter squashes clay, the knitter twists wool, the carpenter cuts wood into pieces. This is the Human Endeavour thread of the curriculum, people use science in their daily lives, and it sets up next week’s making task, where the children become the workers.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

5 minGuess my action
No props, big movements: mime bending a stick, twisting a towel, stretching dough, snapping a biscuit. The class calls out each action word.

Ask: What am I doing to my invisible material?

5 minOn the board
Flick through the four action pictures from the unit as a one-minute recap (see the board box below), naming each action as it moves.

Ask: Who might do this all day at work?

15 minMatch the jobs
Tables spread the six job cards face up and read each one aloud. For every card, children agree on an action word from the word wall: which of our actions is the worker using? Sawing and cutting sit with breaking, because both make smaller pieces of the same stuff.
10 minMime theatre
One child draws a job card, keeps it secret, and mimes the work with big movements. The class calls the action word first, then guesses the job. Play as many rounds as time allows.
20 minWorksheet, then circle up
Children draw the four matching lines, draw a person changing a material, and finish the sentence. Circle up with tonight’s mission; it pairs with the family letter at the front of the pack.

Home mission: Tonight, ask someone at home which materials they change.

Running two half-sessions instead? End Session A after Mime theatre and collect the job cards. Start Session B by miming one job yourself for the class to guess, then go on to the worksheet.

On the board
Open the interactive unit and flick through the four action pictures as a one-minute recap: press “Bend it” on the stick, “Stretch tall” then “Squash flat” on the dough, “Twist more” on the towel, and “Break it” on the biscuit. Name each action out loud as the picture moves, then ask who might do that action all day at work.
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Make it easier, make it bigger

Answers and look-fors

Lesson 9 · Worksheet

Who changes materials?

NameClassDate

Grown-ups change materials at work. Draw a line from each person to the work they do.

The baker
The potter
The knitter
The carpenter
cuts wood into smaller pieces
stretches and folds dough
twists wool into loops
squashes and rolls clay
Draw a person changing a material.
who is it? what material?
Finish the sentence about your picture.

They   the  .

Lesson 9 · Job cards (cut out)

People at work

Cut out the cards, one set for each table. Read each card together and match it to an action word from the word wall. Keep the set for the mime game.

The baker

Stretches and folds soft dough before it is baked.

Which of our actions is this?

The potter

Squashes and rolls clay into bowls.

Which of our actions is this?

The knitter

Twists wool into loops to make a jumper.

Which of our actions is this?

The carpenter

Saws wood into smaller pieces to build.

Which of our actions is this?

The hairdresser

Twists and plaits hair.

Which of our actions is this?

The paper folder

Folds flat paper into birds and boats.

Which of our actions is this?

Teacher note: the hairdresser and the paper folder are the stretch cards; they are not on the worksheet. Hair counts as a material for our purpose, it bends, twists and stretches like one. Sawing sits with breaking (smaller pieces of the same wood), and folding sits with bending (a fold is a bend that stays).

Lesson 10 · Teacher planLesson 10 of 10

Show what we know

The summative lesson, run as a celebration. Children plan and make something of their own by changing materials with at least two of the term’s actions, visit each other’s work in a gallery walk, then sit the final check sheet quietly and alone. The term closes with the on-screen quiz played as a class game. Every model on the table tells the story the term has been telling all along: the shape is new, the stuff is not.

We are learning to

Success criteria

You need

Lesson flow (about 60 minutes)

10 minBrief and plan
Set the task: make anything you like from the makers’ table, use at least two of our seven actions, and be ready to say which ones. Children fill in the making plan: what they will make, which materials, which actions circled, and a drawing.

Ask: Which two actions will you use? Tell your partner before you touch the table.

20 minMaking time
Open the makers’ table. Circulate and ask each maker to name an action while they do it. Plans may change along the way, and that is fine, so long as the maker can still say which actions they used.
10 minGallery walk
Half the class stands by their work while the other half visits, then swap. Visitors guess the actions used; the maker says yes or no and shows the part that proves it.

Ask: Look closely. Which of our actions made this part? Guess first, then ask the maker.

10 minFinal check
Hand out the final check sheet. Children work alone and quietly. Read each item aloud once for young readers; help with reading, not with answers, because this one is the term’s record.
10 minThe class quiz
The closing treat. Run the unit’s self-check quiz on the board as a whole-class game (see the board box): read each question aloud, hands up for each option, then one child taps the class answer.

Ask: One last time, all together: when the shape changes, what happens to the material?

Running two half-sessions instead? End Session A after Making time and keep the models safe on a shelf. Start Session B with the gallery walk, then the final check and the class quiz.

On the board
Open the interactive unit and scroll to the self-check quiz at the bottom of the page. Run it as a whole-class game: read each question aloud, the class votes with hands up for each option, then one child comes up and taps the answer the class chose. Five questions, and every one is something this class has done with their own hands this term.
seegongsik.com/au/y2/chemical/AC9S2U03

Watch for these ideas

Make it easier, make it bigger

Answers and look-fors

Lesson 10 · Worksheet

My making plan

NameClassDate

Today you are the maker. You can make anything you like. Use at least two of our actions, and be ready to say which ones you used.

I will make
Materials I will use
Actions I will use. Circle at least two:
bendtwiststretchbreakfoldrollsquash
Draw your plan
After making
Did your materials stay the same materials?   Yes     No
The trickiest action was
Lesson 10 · Final check

Show what we know

NameClassDate

Show what you know about changing materials. Read each one, then write, circle or draw. Take your time.

1. Write the name of one material.

2. Circle the actions that change a shape:

bend   ·   look at it   ·   twist   ·   say its name   ·   stretch

3. You stretch a rubber band. Is it still rubber?   Yes     No

4. You break a biscuit into four pieces. Circle one: the pieces are ( smaller / new stuff ).

5. Draw a change you CAN undo.

6. Draw a change you can NOT easily undo.

7. Circle one: the dough snake has ( more / the same / less ) dough than the ball it was made from.

8. Finish the sentence: When I change the shape, the material

Teacher note: read the items aloud one at a time. The marking guide is on this lesson’s plan page; the rubric sheet near the front of the pack turns the score into a level.