Grade 3 Math in Ontario — What Your Child Will Learn This Year
Grade 3 is a pivotal year in Ontario math. It’s the first time your child encounters multiplication and division, more complex fractions, and — for many families — the first EQAO math assessment. Here’s exactly what to expect.
Grade 3 Math Curriculum Overview
The Ontario Grade 3 math curriculum covers five strands, and your child is expected to develop foundational skills in all of them by June:
1. Number Sense and Numeration
- Counting and representing numbers to 1,000
- Place value (ones, tens, hundreds)
- Addition and subtraction to 1,000
- Introduction to multiplication (facts to 7 × 7)
- Introduction to division (as equal sharing)
- Fractions: halves, thirds, quarters, and fractions of a set
2. Algebra (Patterning)
- Extending and creating patterns
- Pattern rules using numbers
- Introduction to unknowns (“What number goes in the box?”)
3. Measurement
- Measuring length in cm and m
- Perimeter of shapes
- Telling time to 5-minute intervals
- Calendar skills (months, days, elapsed time)
4. Geometry and Spatial Sense
- Properties of 2D and 3D shapes
- Symmetry
- Location and movement on a grid
5. Data Management and Probability
- Collecting and organizing data
- Reading and creating bar graphs and pictographs
- Describing probability (likely, unlikely, impossible)
The EQAO Factor
Grade 3 is the first EQAO assessment year. The math assessment takes place in the spring and covers all five strands. Results are reported as Levels 1–4, with Level 3 being the provincial standard.
What EQAO Grade 3 math looks like:
- Multiple choice questions
- Short answer questions (your child writes the answer)
- Extended response (show your work, explain your thinking)
The best EQAO preparation is regular practice throughout the year. If your child has been practising consistently, there’s no need to stress about the assessment.
See EQAO-aligned practice questions →
Common Challenges in Grade 3 Math
Multiplication Facts
Many kids find the jump from addition to multiplication confusing. The key is understanding multiplication as “groups of” before memorizing tables. Use arrays (rows and columns) and real-world grouping.
Fractions
This is the first real encounter with fractions. Start with physical manipulatives — cutting paper, sharing food equally, using fraction bars.
Multi-Step Word Problems
Grade 3 introduces problems requiring two operations. Teach the “RUCSAC” approach: Read, Underline key words, Choose the operation, Solve, Answer, Check.
How to Support Your Grade 3 Child
- 15 minutes daily: Short, consistent practice sessions are far more effective than weekend marathons.
- Cover all strands: Don’t just practise number sense — geometry, measurement, and data are equally important (and equally tested by EQAO).
- Celebrate effort, not just answers: “I love that you showed your thinking” matters more than “You got it right.”
- Use adaptive practice: MapleMath’s Grade 3 practice adjusts to your child’s level — so they’re always working in the sweet spot of challenge and confidence.