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What Grade 3 covers in Ontario — and how to practise it at home

Grade 3 is a step-up year: multiplication arrives, reading shifts from learning-to-read toward reading-to-learn. Here is the year as Ontario schools actually teach it — unit by unit, in order — so you can see what your child is working on right now, and what's coming next.

7 unitsMath
4 unitsScience
2 unitsSocial Studies
43 weeksEnglish & French

Math — the 2020 Ontario math curriculum, in teaching order

Ontario math runs as a sequence: each unit builds on the one before it. The week ranges below follow the school year from September; teachers vary pacing.

1

Numbers to 1000

Weeks 1–6 · September–October

Reading, representing, comparing and ordering whole numbers to 1000; place value.

2

Addition & Subtraction

Weeks 7–12 · October–November

Adding and subtracting to 1000 with regrouping using efficient strategies.

3

Multiplication & Division

Weeks 13–19 · November–January

Multiplication and division facts and strategies to 7 x 7.

Worth watching: this is the year times tables form. Little and often beats cramming — they need to be automatic before Grade 4 uses them everywhere.

4

Fractions

Weeks 20–26 · January–February

Representing, comparing and naming simple fractions (halves, thirds, fourths, eighths) of objects, sets and regions; no sixths and no operations on fractions.

5

Patterns, Algebra & Coding

Weeks 27–32 · March–April

Number and shape patterns; equality; simple coding to model patterns.

6

Geometry & Spatial Sense

Weeks 33–38 · April–May

2D and 3D properties; angles as turns; location and movement.

7

Measurement, Data & Money

Weeks 39–43 · May–June

Length, mass, capacity; perimeter and area; time; data; money and change.

Try one — a real Grade 3 question

Math · Division

There are 18 cookies shared equally among 3 friends. How many cookies does each friend get?

A typical first answer
15
Homework Hub's feedback
It looks like you subtracted 3. But "shared equally" means splitting into equal groups — 18 split into 3 equal groups. How many in each group?
Next try
6
Yes — 18 ÷ 3 = 6 cookies each. Sharing equally is division. 🍪

Science across the year

1

Growth and Changes in Plants

Weeks 1–11 · September–November

Characteristics and uses of plants and plants’ responses to the natural environment.

2

Forces and Motion

Weeks 12–22 · November–January

How forces cause motion and changes in motion.

3

Strong and Stable Structures

Weeks 23–32 · February–April

The concepts of strength and stability as they relate to structures with various forms and functions, and the factors that affect structures’ strength and stability.

4

Soils in the Environment

Weeks 33–43 · April–June

The composition of soils, of different types of soils, and processes and practices that can affect the health of soil.

Science · Plants

What do plants need to make their own food?

A typical first answer
They eat soil through their roots.
Homework Hub's feedback
Lots of people think that! Roots do drink water and minerals — but that's not food. Plants make food in their LEAVES, and they need something bright to do it…
Next try
Sunlight, water, and air.
Exactly — leaves use sunlight, water, and air to make the plant's food. Soil helps, but sunshine is the kitchen. 🌱

Social Studies

1

Communities in Canada, 1780–1850

Weeks 1–22 · September–January

Life in early Canadian communities from 1780 to 1850 — the diverse peoples who lived here, including First Nations and Métis peoples and newcomers, their daily lives and work, and how communities formed; told respectfully and centring First Peoples' presence and perspectives, focused on understanding different ways of life.

2

Living and Working in Ontario

Weeks 23–43 · February–June

Living and working in Ontario: municipalities, land use, and the natural environment of the region.

English & French — skills that build weekly, not units

How language works in Grade 3

Unlike math and science, the language curriculum isn't taught as a sequence of units — it's a set of skills that deepen all year: reading comprehension and inference, writing structure and conventions, vocabulary, and oral communication. French works the same way. Homework Hub practises these as grade-matched weekly skills — a reading passage with real comprehension questions, a sentence to fix, a short prompt to write to — rather than pretending there's a unit list.

Practice that follows this exact sequence

Homework Hub generates fresh questions matched to these very units — in season, at your child's level, marked with hints that teach. You set the days; it does the rest.

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This page is generated from the same curriculum map that powers Homework Hub's practice questions (the 2020 Ontario math curriculum and current science and social studies expectations, described in our own words). School boards and teachers vary pacing — week ranges are a typical rhythm, not a rule.