# Teacher guide — Year 3, Issue 1

The Whisper Beneath the Sand

## Focus and scope

- AC9M3M01 — Choose an appropriate metric unit
- AC9M3M02 — Read labelled scales
- AC9M3N02 — Represent multiples of unit fractions
- AC9M3N03 — Solve a practical length problem
- AC9M3N04 — Multiply using equal groups

Supplied-data reasoning/recognition only where applicable. The multiple-choice tasks do not demonstrate independent modelling, actual measurement, construction or full-year mastery.

## Practical follow-up

Use real labelled instruments; draw a simple plan; explain a turn using a right-angle corner. Read clock faces aloud and compare durations.

## Answers

### q01

Check the entrance test gauge. Read the capacity instrument. What measurement does its pointer show?

**Answer: 20 L**

Each gap is 10 L. The pointer is 2 gaps from zero: 2 × 10 = 20 L.

### q02

Prepare the measuring cord. The measuring cord is 45 cm long. The frame uses 20 cm. How much remains?

**Answer: 25 cm**

45 − 20 = 25. There are 25 cm left for the next check.

### q03

Label the supplies. Which unit should Blaze use to measure the mass of the supply crate?

**Answer: kilograms**

Mass describes how heavy an object is. Kilograms are suitable here.

### q04

Check the test-frame load. Read the mass instrument. What measurement does its pointer show?

**Answer: 30 kg**

Each gap is 10 kg. The pointer is 3 gaps from zero: 3 × 10 = 30 kg.

### q05

Inspect the test container. What fraction of the whole test container is filled?

**Answer: 3/4**

3 of the 4 equal parts are filled, so the fraction is 3/4.

### q06

Verify a fresh instrument reading. Read the capacity instrument. What measurement does its pointer show?

**Answer: 40 L**

Each gap is 10 L. The pointer is 4 gaps from zero: 4 × 10 = 40 L.

### q07

Choose a useful measuring unit. Which unit should Blaze use to measure the capacity of a water container?

**Answer: litres**

Capacity is the amount a container can hold. Litres are suitable here.

### q08

Prepare the removable frame. Blaze fits 4 clips on each of 3 frames. How many clips does she need?

**Answer: 12**

3 groups of 4: 3 × 4 = 12 clips.

### q09

Check spare cord for the survey. The measuring cord is 55 cm long. The frame uses 24 cm. How much remains?

**Answer: 31 cm**

55 − 24 = 31. There are 31 cm left for the next check.

### q10

Vane’s note says 60 cm. Complete the entrance survey. Read the length instrument. What measurement does its pointer show?

**Answer: 20 cm**

Each gap is 10 cm. The pointer is 2 gaps from zero: 2 × 10 = 20 cm. Vane’s claim of 60 cm does not match the original measurement.

## Compulsory speed practice

- Chapter 1: 3 × 2 = ? Answer: 6 (AC9M3A03)
- Chapter 2: 20 ÷ 4 = ? Answer: 5 (AC9M3A03)
- Chapter 3: 5 × 8 = ? Answer: 40 (AC9M3A03)
- Chapter 4: 20 ÷ 10 = ? Answer: 2 (AC9M3A03)
- Chapter 5: 2 × 5 = ? Answer: 10 (AC9M3N04)

## Source

[QCAA Year 3 Australian Curriculum v9 alignment](https://www.qcaa.qld.edu.au/downloads/aciqv9/mathematics/curriculum/ac9_maths_yr3_as_cd_alignment.pdf), checked 19 September 2026.