Grade Three Math Curriculum


Grade 3 is the class by which the children have realized that school is a part of their routine, so are concepts like homework. More confident than second graders, children in grade 3 are also more expressive about their thoughts and emotions. This is also the age where children influence each other easily. In the meantime, understanding of mathematical concepts becomes even more critical for students. The information provided in this page are identical to the Official Grade Three Math Curriculum  established by the Ministry of Education.
Grade Three Math Curriculum

Table of Contents

Overall and Specific Expectations

The overall expectations are divided in five main categories each of which contains several subcategories. Every subcategory lists specific expectations for grade 3 in more detail.


A. Number Sense 
Students will demonstrate an understanding of numbers and make connections to the way numbers are used in everyday life. They will

1.Whole numbers

      • read, represent, compose, and decompose whole numbers up to and including 1000, using a variety of tools and strategies, and describe various ways they are used in everyday life.
      • compare and order whole numbers up to and including 1000, in various contexts.
      • round whole numbers to the nearest ten or hundred, in various contexts.
      • count to 1000, including by 50s, 100s, and 200s, using a variety of tools and strategies.
      • use place value when describing and representing multi-digit numbers in a variety of ways, including with base ten materials.


      • use drawings to represent, solve, and compare the results of fair-share problems that involve sharing up to 20 items among 2, 3, 4, 5, 6, 8, and 10 sharers, including problems that result in whole numbers, mixed numbers, and fractional amounts.
      • represent and solve fair-share problems that focus on determining and using equivalent fractions, including problems that involve halves, fourths, and eighths; thirds and sixths; and fifths and tenths.

Students will use knowledge of numbers and operations to solve mathematical problems encountered in everyday life. They will:

1.Properties and Relationships

      • use the properties of operations, and the relationships between multiplication and division, to solve problems and check calculations.

2. Math Facts

      • recall and demonstrate multiplication facts of 2, 5, and 10, and related division facts.

3. Mental Math 

      • use mental math strategies, including estimation, to add and subtract whole numbers that add up to no more than 1000, and explain the strategies used.

4. Addition and Subtraction

      • demonstrate an understanding of algorithms for adding and subtracting whole numbers by making connections to and describing the way other tools and strategies are used to add and subtract.
      • represent and solve problems involving the addition and subtraction of whole numbers that add up to no more than 1000, using various tools and algorithms.

5. Multiplication and Division

      • represent multiplication of numbers up to 10 × 10 and division up to 100 ÷ 10, using a variety of tools and drawings, including arrays.
      • represent and solve problems involving multiplication and division, including problems that involve groups of one half, one fourth, and one third, using tools and drawings.
      • represent the connection between the numerator of a fraction and the repeated addition of the unit fraction with the same denominator using various tools and drawings, and standard fractional notation.
      • use the ratios of 1 to 2, 1 to 5, and 1 to 10 to scale up numbers and to solve problems.


A. Patterns and Relationships 
Students will identify, describe, extend, create, and make predictions about a variety of patterns, including those found in real-life contexts. They will

1. Patterns 

      • identify and describe repeating elements and operations in a variety of patterns, including patterns found in real-life contexts.
      • create and translate patterns that have repeating elements, movements, or operations using various representations, including shapes, numbers, and tables of values.
      • determine pattern rules and use them to extend patterns, make and justify predictions, and identify missing elements in patterns that have repeating elements, movements, or operations.
      • create and describe patterns to illustrate relationships among whole numbers up to 1000.

B. Equations and Inequalities
Students will demonstrate an understanding of variables, expressions, equalities, and inequalities, and apply this understanding in various contexts. They will:

1. Variables

      • describe how variables are used and use them in various contexts as appropriate.

2. Equalities and Inequalities

      • determine whether given sets of addition, subtraction, multiplication, and division expressions are equivalent or not.
      • identify and use equivalent relationships for whole numbers up to 1000, in various contexts.

C. Coding
Students will solve problems and create computational representations of mathematical situations using coding concepts and skills. They will:

1. Coding Skills

      • solve problems and create computational representations of mathematical situations by writing and executing code, including code that involves sequential, concurrent, and repeating events.
      • read and alter existing code, including code that involves sequential, concurrent, and repeating events, and describe how changes to the code affect the outcomes.

D. Mathematical Modelling
Students will apply the process of mathematical modelling to represent, analyse, make predictions, and provide insight into real-life situations.


A. Data Literacy 
Students will manage, analyse, and use data to make convincing arguments and informed decisions, in various contexts drawn from real life. They will

1. Data Collection and Organization 

      • sort sets of data about people or things according to two and three attributes, using tables and logic diagrams, including Venn, Carroll, and tree diagrams, as appropriate.
      • collect data through observations, experiments, and interviews to answer questions of interest that focus on qualitative and quantitative data and organize the data using frequency tables.

2. Data Visualization

      • display sets of data, using many-to-one correspondence, in pictographs and bar graphs with proper sources, titles, and labels, and appropriate scales.

3. Data Analysis 

      • determine the mean and identify the mode(s), if any, for various data sets involving whole numbers, and explain what each of these measures indicates about the data.
      • analyse different sets of data presented in various ways, including in frequency tables and in graphs with different scales, by asking and answering questions about the data and drawing conclusions, then make convincing arguments and informed decisions.

B. Probability
Students will describe the likelihood that events will happen and use that information to make predictions. They will

1. Probability

      • use mathematical language, including the terms “impossible”, “unlikely”, “equally likely”, “likely”, and “certain”, to describe the likelihood of events happening, and use that likelihood to make predictions and informed decisions.
      • make and test predictions about the likelihood that the mean and the mode(s) of a data set will be the same for data collected from different populations.

Spatial Sense

A. Geometric and Spatial Reasoning 
Students will describe and represent shape, location, and movement by applying geometric properties and spatial relationships to navigate the world around them. They will

1. Geometric Reasoning

      • sort, construct, and identify cubes, prisms, pyramids, cylinders, and cones by comparing their faces, edges, vertices, and angles.
      • compose and decompose various structures and identify the two-dimensional shapes and three-dimensional objects that these structures contain.
      • identify congruent lengths, angles, and faces of three-dimensional objects by mentally and physically matching them and determine if the objects are congruent.

2. Location and Movement

      • give and follow multistep instructions involving movement from one location to another, including distances and half- and quarter-turns.

B. Measurement
Students will compare, estimate, and determine measurements in various contexts. They will

1.Length, Mass, and Capacity

      • use appropriate units of length to estimate, measure, and compare the perimeters of polygons and curved shapes, and construct polygons with a given perimeter.
      • explain the relationships between millimetres, centimetres, metres, and kilometres as metric units of length, and use benchmarks for these units to estimate lengths.
      • use non-standard units appropriately to estimate, measure, and compare capacity, and explain the effect that overfilling or underfilling, and gaps between units, have on accuracy.
      • compare, estimate, and measure the mass of various objects, using a pan balance and non- standard units.
      • use various units of different sizes to measure the same attribute of a given item and demonstrate that even though using different-sized units produces a different count, the size of the attribute remains the same.

2. Time

      • use analog and digital clocks and timers to tell time in hours, minutes, and seconds.

         3. Area

      • compare the areas of two-dimensional shapes by matching, covering, or decomposing and recomposing the shapes, and demonstrate that different shapes can have the same area.
      • use appropriate non-standard units to measure area and explain the effect that gaps and overlaps have on accuracy.
      • use square centimetres (cm2) and square metres (m2) to estimate, measure, and compare the areas of various two-dimensional shapes, including those with curved sides.

Financial Literacy

A. Money and Finances 
Students will demonstrate an understanding of the value of Canadian currency. They will

1. Money Concepts

      • estimate and calculate the change required for various simple cash transactions involving whole-dollar amounts and amounts of less than one dollar.

List of Skills

More than 420 math skills are considered in the math curriculum for grade 3 most of which are common to grade 2. Please, use the detailed list of skills in the old LG for grade 3.


Objective evaluation is believed to be one of the most essential parts of teaching mathematics. In Genius Math, we use different tools and methods to evaluate the mathematical knowledge of students and their progress. Our evaluation process consists of three stages: before teaching sessions, during teaching sessions and after teaching sessions.

  1. Initial Assessment Test
    Before starting our teaching sessions, we administrate an assessment test to obtain some insights on the strengths and weaknesses of students and their previous math knowledge. This key information helps us to come up with a special plan for every single student.
  2. Standard Problems
    During teaching sessions, we use a combination of different resources providing standard problems that are designed by famous mathematicians all over the world to improve the problem-solving skills of students. Among those resources are Math Kangaroo Contests, CEMC (University of Waterloo), AMC (American Mathematics Competitions), and even IMO (International Mathematics Olympiad), the latter might be considered for those who want to tackle more challenging problems or prepare for math olympiads. We use these problems to design homework, quizzes, and tests for our students based on their grades, needs and goals. As a matter of fact, such problems can be used to unveil the depth of students’ mathematical understanding.
  3. Final Assessment Test
    When teaching sessions are over, students are asked to take another assessment test aiming to show their real progress in mathematics.

Most Common Challenging Topics

The followings are among the most common challenges students face in grade 3:
  1. Fractions and mixed numbers
  2. Variables and equations
  3. Data analysis
  4. Transformations
  5. Measurement
  6. Probability

What We Can Offer

Students have different goals and expectations according to their background, knowledge, or experience. This data along with the result of assessment session help us to design a unique plan for each student. There are different kinds of helps that we offer students in Genius Math:
  1. To review and practice their class notes and handouts
  2. To be helped with their homework, quizzes, and tests
  3. To improve their math skills in general
  4. To level up (e.g., moving from B- to B+)
  5. To get A+
  6. To learn topics beyond curriculum
  7. To prepare for math competitions
See Our Lessons & Pricing!