Year 1 Mathematics – Term 2 (WA Curriculum): Subtraction and More

What this unit covers

In Term 2, Year 1 Mathematics in the WA Curriculum centres on the unit “Subtraction and More”.

Term 2 Mathematics for Year 1. 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. Exploring Take Away Using Concrete Materials
2. Acting Out Subtraction Stories with Role-Play
3. Taking Away from Collections Up to 10
4. Recording Subtraction Using Pictures and Symbols
5. Solving Take Away Problems Within 20
6. Finding the Difference Between Two Collections
7. Using Number Lines for Subtraction
8. Exploring Equal Groups Using Concrete Materials
9. Making Groups of Two Using Collections
10. Creating Groups of Five with Objects
11. Forming Groups of Ten from Collections
12. Skip Counting by Twos to 20
13. Skip Counting by Fives to 50
14. Skip Counting by Tens to 100
15. Exploring Equal Sharing with Physical Objects
16. Sharing Collections Equally Between Two Groups
17. Dividing Objects into Equal Groups
18. Creating a Half by Folding Paper Shapes
19. Finding Half of a Collection by Equal Sharing
20. Identifying Halves in Everyday Objects
21. Using Half Language in Sharing Activities
22. Identifying Australian Coins by Value
23. Recognising Australian Notes and Their Values
24. Exploring Different Ways to Pay for Items
25. Continuing Colour and Shape Patterns
26. Creating Repeating Patterns with Objects
27. Identifying the Core Unit in Repeating Patterns
28. Labelling Pattern Elements and Core Units
29. Comparing Mass by Hefting Heavy and Light Objects
30. Using Balance Scales to Compare Mass of Two Objects
31. Ordering Objects from Lightest to Heaviest Using Balance Scales
32. Comparing Capacity by Filling and Emptying Containers
33. Using Informal Units to Measure Capacity of Containers
34. Exploring Volume by Building with Blocks and Counting Units
35. Describing Events as Likely or Unlikely Using Everyday Language
36. Sorting Objects into Categories for Data Collection
37. Collecting Data by Counting and Recording Simple Tallies
38. Creating Picture Graphs Using One-to-One Correspondence
39. Reading and Interpreting Simple Picture Graphs to Answer Questions
40. Comparing Data Sets to Identify Most and Least Popular Categories

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.