Year 3 Mathematics – Term 2 (WA Curriculum): Subtraction and More

What this unit covers

In Term 2, Year 3 Mathematics in the WA Curriculum centres on the unit “Subtraction and More”.

Term 2 Mathematics for Year 3. Focus areas: subtraction, multiplication concepts. Aligned with WA Curriculum v9.

Lesson sequence (40 lessons)

The unit breaks down into the following lesson-by-lesson sequence — each title below is a teachable lesson, in order:

1. Partitioning Two-Digit Numbers Using Part-Part-Whole Models
2. Representing Three-Digit Numbers with Hundreds, Tens and Ones
3. Reading and Writing Numbers to 1000 in Words and Numerals
4. Ordering Three-Digit Numbers on a Number Line
5. Exploring the Relationship Between Addition and Subtraction Facts
6. Using Part-Part-Whole Models to Solve Subtraction Problems
7. Recalling Addition and Subtraction Facts to 20 Fluently
8. Solving Two-Digit Subtraction Without Regrouping
9. Solving Two-Digit Subtraction with Regrouping
10. Representing Real-World Subtraction Situations with Models
11. Exploring Multiplication as Repeated Addition Using Arrays
12. Creating Equal Groups to Show Multiplication Concepts
13. Representing Multiplication Stories with Diagrams and Number Sentences
14. Learning Multiplication Facts for the 2 Times Table
15. Learning Multiplication Facts for the 5 Times Table
16. Learning Multiplication Facts for the 10 Times Table
17. Exploring the Relationship Between Multiplication and Division
18. Using Arrays to Show Division as Sharing Equally
19. Recalling Division Facts Related to 2, 5 and 10 Times Tables
20. Recognising Unit Fractions One-Half and One-Quarter
21. Representing One-Third and One-Fifth Using Concrete Materials
22. Describing One-Tenth Using Visual Models and Real Objects
23. Combining Unit Fractions with Same Denominators
24. Creating Additive Patterns Starting from Different Numbers
25. Describing Rules for Increasing and Decreasing Number Patterns
26. Investigating Money Transactions and Calculating Change
27. Recognising Equivalent Values in Australian Currency
28. Solving Multi-Step Problems Using Addition, Subtraction and Multiplication
29. Comparing Mass Using Balance Scales and Everyday Objects
30. Estimating and Measuring Mass in Grams Using Standard Units
31. Measuring and Ordering Objects by Mass in Kilograms
32. Exploring Capacity by Comparing Container Sizes Using Informal Units
33. Measuring and Ordering Capacity in Millilitres Using Standard Tools
34. Estimating Large Capacities Using Litre Containers as Reference
35. Identifying Certain, Possible and Impossible Events in Daily Life
36. Listing All Possible Outcomes for Simple Chance Events
37. Collecting Data Through Surveys About Student Preferences
38. Organising Collected Data Using Tally Marks and Tables
39. Creating Column Graphs with One-Unit Scale Intervals
40. Reading and Interpreting Information from Dot Plots

Curriculum codes in this unit

Content codes:

Reading the codes: WA codes (the ones starting with WA) pack the year level, learning area, strand and content number into one string, while the national Australian Curriculum v9 uses a different anatomy that starts with AC9 — same content family, different labels. Our complete WA Curriculum guide decodes both, character by character.

Planning notes for Term 2

WA terms run roughly 9–11 weeks, and in 2026 Term 2 runs from Monday 20 April to Friday 3 July — 11 weeks for WA public schools. With 40 lessons in this unit, that leaves breathing room for assessment, moderation and the weeks that disappear to carnivals, camps and public holidays — plan the assessable work to land two to three weeks before the end of term rather than in the final week.