YEAR 3 GUIDE · PHASE 1
A parent and teacher guide to Year 3 of the refreshed NZ maths curriculum — what’s taught, how to spot readiness, and how to help at home.
🧮Year 3 is the last year of Phase 1 — the consolidation year. Numbers reach 1000, written column methods appear, the times-table collection grows, and fractions become things children can count with and compare. Remember the golden rule of the refreshed curriculum: it's progression-based — children move on when they're ready, not on a birthday. Treat year levels as a guide only.
Children work with whole numbers to 1000, round to the nearest 10 or 100, and estimate before calculating. The big new tool is column addition and subtraction with renaming (regrouping/carrying), plus complements to 100 (34 + ⬚ = 100). The times-table set grows to 2, 3, 4, 5, 8 and 10, with multiplying one- and two-digit numbers and dividing without remainders. In fractions, children compare unit fractions (1/6 is bigger than 1/12!), count in fractions up to 1, and add and subtract fractions with the same denominator. Money gets practical: making amounts and giving change.
✅ Signs your child is ready to move on
Before working anything out: 'about how much?' 298 + 305 is about 600. Estimation is an official Year 3 skill and the best error-detector there is.
You say 34, they say 66. On the couch, in the car — instant complements to 100 make column subtraction far easier.
Real coins, little price tags: they total the basket and give you change. Money is the curriculum's favourite excuse for adding and subtracting to 1000.
Cut toast into halves, quarters, eighths. 'Which piece is bigger, 1/4 or 1/8?' Seeing that more pieces means smaller pieces is THE Year 3 fraction idea.
Add 3s, 4s and 8s to the 2s, 5s and 10s they know. A minute a day, mixed up, out of order — recall that survives shuffling is the goal.
Every Year 3 mystery on Kiwi123 practises one focus skill from this year, inside a whodunit — so the maths practice feels like detective work, not drill. Browse the Year 3 mysteries → Or see everything in Phase 1 (Years 0–3).
Every Year 3 mystery practises one skill from this year inside a whodunit maths activity. The first ones are free — no account needed.
Open the Year 3 mysteries →