Teaching pack · Year 9 Measurementseegongsik /au
Absolute, Relative and Percentage Error: a week of ready-to-teach maths
Five days of lessons for Year 9 Measurement. Print this pack and the week is prepared.
AC9M9M04
calculate and interpret absolute, relative and percentage errors in measurements, recognising that all measurements are estimates
Start here: five minutes to Monday
- Skim the week at a glance.
- Print the five days (plan + worksheet each).
- Cut out the card sheet once.
- Open the free interactive unit on your board.
- Teach from the plan.
On the board
On-screen pictures: “Measurement is an estimate”, “Absolute error: the gap”, “Same error, different proportion”, “From relative to percentage”, “Instrument precision”.
seegongsik.com/au/y9/measurement/AC9M9M04
Aligned to Australian Curriculum V9 (AC9M9M04). Original material from seegongsik. Descriptors (c) ACARA, CC BY 4.0.
The week at a glance5 lessons
The week at a glance
One lesson a day. Run them in order where you can.
| Day | Lesson | Children learn and do | On screen |
|---|---|---|---|
| 1 | Measurement is an estimate | Practise the idea with talk, board and worksheet | Board: Measurement is an estimate |
| 2 | Absolute error: the gap | Practise the idea with talk, board and worksheet | Board: Absolute error: the gap |
| 3 | Same error, different proportion | Practise the idea with talk, board and worksheet | Board: Same error, different proportion |
| 4 | From relative to percentage | Practise the idea with talk, board and worksheet | Board: From relative to percentage |
| 5 | Instrument precision | Practise the idea with talk, board and worksheet | Board: Instrument precision |
Materials
- This pack printed.
- Pencils and the board or projector.
- Optional counters or rulers if a day plan names them.
A note home
This week in maths we work on absolute, relative and percentage error. Ask: What did you practise today?
seegongsik.com/au/y9/measurement/AC9M9M04/pack
Day 1 · Teacher planDay 1 of 5
Measurement is an estimate
Children practise “Measurement is an estimate” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain measurement is an estimate in Year 9 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Measurement is an estimate”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Measurement is an estimate”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Measurement is an estimate” on screen for the main block.
seegongsik.com/au/y9/measurement/AC9M9M04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about measurement is an estimate.
Day 1 · Worksheet
Measurement is an estimate
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Day 2 · Teacher planDay 2 of 5
Absolute error: the gap
Children practise “Absolute error: the gap” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain absolute error: the gap in Year 9 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Absolute error: the gap”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Absolute error: the gap”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Absolute error: the gap” on screen for the main block.
seegongsik.com/au/y9/measurement/AC9M9M04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about absolute error: the gap.
Day 2 · Worksheet
Absolute error: the gap
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Day 3 · Teacher planDay 3 of 5
Same error, different proportion
Children practise “Same error, different proportion” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain same error, different proportion in Year 9 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Same error, different proportion”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Same error, different proportion”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Same error, different proportion” on screen for the main block.
seegongsik.com/au/y9/measurement/AC9M9M04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about same error, different proportion.
Day 3 · Worksheet
Same error, different proportion
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Day 4 · Teacher planDay 4 of 5
From relative to percentage
Children practise “From relative to percentage” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain from relative to percentage in Year 9 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “From relative to percentage”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “From relative to percentage”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “From relative to percentage” on screen for the main block.
seegongsik.com/au/y9/measurement/AC9M9M04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about from relative to percentage.
Day 4 · Worksheet
From relative to percentage
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Day 5 · Teacher planDay 5 of 5
Instrument precision
Children practise “Instrument precision” with talk, the board picture, and a short worksheet. About 40 minutes.
We are learning to
- explain instrument precision in Year 9 words,
- use the board picture to check thinking,
- record an example on paper.
Success criteria
- I can show one example of today’s idea.
- I can say the idea in a short sentence.
You need
- interactive unit open on “Instrument precision”,
- worksheet (next sheet), one per child,
Lesson flow (about 40 minutes)
| 5 min | Warm-up Ask: “What might help us today?” |
| 10 min | On the board Open “Instrument precision”. Ask: “What changed on the screen?” |
| 15 min | Worksheet Children complete the day sheet. |
| 10 min | Share Ask: “In one sentence, what was today’s idea?” |
On the board
Leave “Instrument precision” on screen for the main block.
seegongsik.com/au/y9/measurement/AC9M9M04
Watch for
- Skipping the board -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Answers and look-fors
- Meeting the idea sounds like a clear sentence about instrument precision.
Day 5 · Worksheet
Instrument precision
NameClassDate
Use the board picture. Show your thinking.
1. Draw or write one example from the board.
2. What is the main idea in your words?
3. Make a second example of your own.
I know I am right because
I can teach this idea to a partner:Yes □ No □
Cut-out cardsReuse all week
Talk cards for Absolute, Relative and Percentage Error
Cut out. Hold up a card and give an example.
Measurement is an estimate
Give an example.
Absolute error: the gap
Give an example.
Same error, different proportion
Give an example.
From relative to percentage
Give an example.
Instrument precision
Give an example.
Store in an envelope labelled AC9M9M04.
Mini-check · End of week
Show what you know: Absolute, Relative and Percentage Error
NameClassDate
Work on your own. Use pictures or numbers.
1. Draw or write the big idea of this week.
2. Give one clear example.
3. Give a second different example.
4. What mistake should we watch for?
I can explain this idea to a partner:Yes □ No □
Mini-check · AnswersTeacher
Answers and look-fors
- Item 1 names the unit idea (absolute, relative and percentage error) in child words.
- Items 2-3: two different correct examples.
- Item 4: a real muddle for this topic.
Use day-plan look-fors across the week.