Illustrative Mathematics K–5 · Grade 3
Grade 3
Pick a unit. Learn it step by step, then practice it with a game. Each one lines up with a unit from class.
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Unit 1
Introducing Multiplication
Read picture and bar graphs where each picture counts for 2, 5, or 10, then multiply with equal groups and arrays, find unknown numbers, and turn factors around.
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Unit 2
Area & Multiplication
Cover shapes with square units, multiply side lengths to find the area of a rectangle, pick square centimeters, inches, feet, or meters, and find the area of figures made of rectangles.
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Unit 3
Wrapping Up Addition & Subtraction within 1,000
Add and subtract within 1,000 on open number lines, by place, and with the standard algorithms, round to the nearest ten and hundred, estimate to check, and solve two-step stories.
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Unit 4
Relating Multiplication to Division
Split things into equal groups, find a missing factor, spot patterns in the multiplication table, break apart rectangles, and multiply and divide larger numbers with base-ten blocks and area diagrams.
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Unit 5
Fractions as Numbers
Cut shapes into equal parts, build fractions from unit fractions, find fractions on the number line, write whole numbers as fractions, find equivalent fractions, and compare fractions.
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Unit 6
Measuring Length, Time, Liquid Volume & Weight
Measure to the half and fourth inch, read and make line plots, weigh in grams and kilograms, measure liters, tell time to the minute, find elapsed time, and solve measurement stories.
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Unit 7
Two-dimensional Shapes & Perimeter
Sort shapes by their sides and right angles, tell rhombuses, rectangles, and squares apart, find the perimeter on a grid and from side lengths, find a missing side, and compare rectangles with the same perimeter or the same area.
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Unit 8
Putting It All Together
Look back at the year: estimate fractions, put fractions greater than 1 on the number line and compare them, plan and shop for a tiny house, graph a survey, and multiply and divide with pictures and facts.