Getting things ready
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This will only take a moment.
Grade 3 covers numbers to 1,000, multiplication and division facts, fractions, patterns, measurement, data, chance, and money.
Ontario's curriculum lists expectations by strand and does not set a teaching order. This order is our suggestion, based on how Ontario school boards plan Grade 3: number and operations early, with facts and mental math practised all year. Your teacher's order may differ.
Place value to 1,000 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 use place value when describing and representing multi-digit numbers in a variety of ways, including with base ten materialsB1.1
B1.5
Comparing and ordering numbers to 1,000 compare and order whole numbers up to and including 1000, in various contextsB1.2
Counting by 50s, 100s and 200s count to 1000, including by 50s, 100s, and 200s, using a variety of tools and strategiesB1.4
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 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 tablesD1.2
Practice coming soon
Place value to 1,000 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 use place value when describing and representing multi-digit numbers in a variety of ways, including with base ten materialsB1.1
B1.5
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculumB2.3
A1
Rounding to the nearest ten or hundred round whole numbers to the nearest ten or hundred, in various contextsB1.3
Using multiplication facts to divide use the properties of operations, and the relationships between multiplication and division, to solve problems and check calculations represent multiplication of numbers up to 10 × 10 and division up to 100 ÷ 10, using a variety of tools and drawings, including arraysB2.1
B2.6
Addition and subtraction within 1,000 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 algorithmsB2.4
B2.5
Equal expressions and missing numbers 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 contextsC2.2
C2.3
Addition and subtraction within 1,000 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 algorithmsB2.4
B2.5
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculumB2.3
A1
Patterns that repeat numbers or steps 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 valuesC1.1
C1.2
Number patterns to 1,000 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 1000C1.3
C1.4
A letter can stand for a number describe how variables are used, and use them in various contexts as appropriateC2.1
Patterns that repeat numbers or steps 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 valuesC1.1
C1.2
Number patterns to 1,000 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 1000C1.3
C1.4
Equal expressions and missing numbers 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 contextsC2.2
C2.3
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculumB2.3
A1
Multiplication facts of 2, 5 and 10 (and related division facts) recall and demonstrate multiplication facts of 2, 5, and 10, and related division factsB2.2
Representing multiplication to 10 × 10 and division to 100 ÷ 10 with arrays represent multiplication of numbers up to 10 × 10 and division up to 100 ÷ 10, using a variety of tools and drawings, including arraysB2.6
Multiplication and division problems (including groups of 1/2, 1/4, 1/3) represent and solve problems involving multiplication and division, including problems that involve groups of one half, one fourth, and one third, using tools and drawingsB2.7
Groups of one half, one third and one fourth represent and solve problems involving multiplication and division, including problems that involve groups of one half, one fourth, and one third, using tools and drawingsB2.7
Making change from whole dollars estimate and calculate the change required for various simple cash transactions involving whole-dollar amounts and amounts of less than one dollarF1.1
Using multiplication facts to divide use the properties of operations, and the relationships between multiplication and division, to solve problems and check calculations represent multiplication of numbers up to 10 × 10 and division up to 100 ÷ 10, using a variety of tools and drawings, including arraysB2.1
B2.6
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculum recall and demonstrate multiplication facts of 2, 5, and 10, and related division factsB2.3
A1
B2.2
Perimeter of polygons use appropriate units of length to estimate, measure, and compare the perimeters of polygons and curved shapes, and construct polygons with a given perimeterE2.1
Millimetres, centimetres, metres and kilometres explain the relationships between millimetres, centimetres, metres, and kilometres as metric units of length, and use benchmarks for these units to estimate lengthsE2.2
sort, construct, and identify cubes, prisms, pyramids, cylinders, and cones by comparing their faces, edges, vertices, and angles sort, construct, and identify cubes, prisms, pyramids, cylinders, and cones by comparing their faces, edges, vertices, and anglesE1.1
Practice coming soon
compose and decompose various structures, and identify the two-dimensional shapes and three-dimensional objects that these structures contain compose and decompose various structures, and identify the two-dimensional shapes and three-dimensional objects that these structures containE1.2
Practice coming soon
identify congruent lengths, angles, and faces of three-dimensional objects by mentally and physically matching them, and determine if the objects are congruent identify congruent lengths, angles, and faces of three-dimensional objects by mentally and physically matching them, and determine if the objects are congruentE1.3
Practice coming soon
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 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 sameE2.5
Practice coming soon
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculum recall and demonstrate multiplication facts of 2, 5, and 10, and related division factsB2.3
A1
B2.2
Fair shares and equivalent fractions 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 tenthsB1.6
B1.7
Fractions as unit fractions added together 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 notationB2.8
Scaling up with 1 to 2, 1 to 5 and 1 to 10 use the ratios of 1 to 2, 1 to 5, and 1 to 10 to scale up numbers and to solve problemsB2.9
Fair shares and equivalent fractions 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 tenthsB1.6
B1.7
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculum recall and demonstrate multiplication facts of 2, 5, and 10, and related division factsB2.3
A1
B2.2
solve problems and create computational representations of mathematical situations by writing and executing code, including code that involves sequential, concurrent, and repeating events solve problems and create computational representations of mathematical situations by writing and executing code, including code that involves sequential, concurrent, and repeating eventsC3.1
Practice coming soon
read and alter existing code, including code that involves sequential, concurrent, and repeating events, and describe how changes to the code affect the outcomes read and alter existing code, including code that involves sequential, concurrent, and repeating events, and describe how changes to the code affect the outcomesC3.2
Practice coming soon
give and follow multistep instructions involving movement from one location to another, including distances and half- and quarter-turns give and follow multistep instructions involving movement from one location to another, including distances and half- and quarter-turnsE1.4
Practice coming soon
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculum recall and demonstrate multiplication facts of 2, 5, and 10, and related division factsB2.3
A1
B2.2
Sorting by two things at once 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 appropriateD1.1
Pictographs and bar graphs with scales display sets of data, using many-to-one correspondence, in pictographs and bar graphs with proper sources, titles, and labels, and appropriate scalesD1.3
Mean and mode of a small data set 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 dataD1.4
Reading a graph that counts by 2s, 5s or 10s 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 decisionsD1.5
How likely is it? 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 decisionsD2.1
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 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 populationsD2.2
Practice coming soon
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculum recall and demonstrate multiplication facts of 2, 5, and 10, and related division factsB2.3
A1
B2.2
Telling time in hours, minutes and seconds use analog and digital clocks and timers to tell time in hours, minutes, and secondsE2.6
Area in square centimetres use square centimetres (cm²) and square metres (m²) to estimate, measure, and compare the areas of various two-dimensional shapes, including those with curved sidesE2.9
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 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 accuracyE2.3
Practice coming soon
compare, estimate, and measure the mass of various objects, using a pan balance and non-standard units compare, estimate, and measure the mass of various objects, using a pan balance and non-standard unitsE2.4
Practice coming soon
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 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 areaE2.7
Practice coming soon
use appropriate non-standard units to measure area, and explain the effect that gaps and overlaps have on accuracy use appropriate non-standard units to measure area, and explain the effect that gaps and overlaps have on accuracyE2.8
Practice coming soon
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculum recall and demonstrate multiplication facts of 2, 5, and 10, and related division factsB2.3
A1
B2.2
Addition and subtraction within 1,000 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 algorithmsB2.4
B2.5
Representing multiplication to 10 × 10 and division to 100 ÷ 10 with arrays represent multiplication of numbers up to 10 × 10 and division up to 100 ÷ 10, using a variety of tools and drawings, including arraysB2.6
Using multiplication facts to divide use the properties of operations, and the relationships between multiplication and division, to solve problems and check calculations represent multiplication of numbers up to 10 × 10 and division up to 100 ÷ 10, using a variety of tools and drawings, including arraysB2.1
B2.6
Multiplication and division problems (including groups of 1/2, 1/4, 1/3) represent and solve problems involving multiplication and division, including problems that involve groups of one half, one fourth, and one third, using tools and drawingsB2.7
Groups of one half, one third and one fourth represent and solve problems involving multiplication and division, including problems that involve groups of one half, one fourth, and one third, using tools and drawingsB2.7
Scaling up with 1 to 2, 1 to 5 and 1 to 10 use the ratios of 1 to 2, 1 to 5, and 1 to 10 to scale up numbers and to solve problemsB2.9
Making change from whole dollars estimate and calculate the change required for various simple cash transactions involving whole-dollar amounts and amounts of less than one dollarF1.1
Keep practising 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 apply, to the best of their ability, a variety of social-emotional learning skills to support their use of the mathematical processes and their learning in connection with the expectations in the other five strands of the mathematics curriculum recall and demonstrate multiplication facts of 2, 5, and 10, and related division factsB2.3
A1
B2.2
Curriculum: The Ontario Curriculum, Grades 1-8: Mathematics (2020). Last verified 2026-10-17.