Math Ladder · Elementary · Grade 3

Grade 3

Multiplication and division facts and what they mean, unit fractions and fractions on the number line, area and perimeter.

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49 topics in 9 units. Builds on Grade 2. Leads to Grade 4. Not sure this is the right course? Find your rung.

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Unit 1 Numbers to 1,000

5 topics

Round, estimate, and add and subtract three-digit numbers with confidence.

  1. Rounding to the Nearest 10 or 100
  2. Adding within 1,000
  3. Subtracting within 1,000
  4. Subtracting Across Zeros
  5. Estimating Sums and Differences

Unit 2 What Multiplication Means

10 topics

See multiplication as equal groups and arrays, and learn the facts with strategies.

  1. Equal Groups
  2. Arrays
  3. Turn-Around Facts
  4. Multiplying by 0 and 1
  5. Facts of 2, 5 and 10
  6. Facts of 3, 4 and 6
  7. Breaking Apart a Fact
  8. Facts of 7, 8 and 9
  9. Grouping Factors
  10. Multiplying by Multiples of 10

Unit 3 What Division Means

6 topics

See division as sharing and as making groups, and connect it to multiplication.

  1. Division as Fair Sharing
  2. Division as Making Groups
  3. Division as a Missing Factor
  4. Fact Families
  5. Dividing with 0 and 1
  6. Finding the Unknown Number

Unit 4 Word Problems and Patterns

4 topics

Choose the operation, model the problem, and check the answer.

  1. Multiplication and Division Word Problems
  2. Using a Letter for the Unknown
  3. Two-Step Word Problems
  4. Patterns in the Tables

Unit 5 Fractions

9 topics

Understand fractions as equal parts, place them on the number line, and compare them.

  1. Equal Parts of a Whole
  2. Unit Fractions
  3. Building Fractions from Unit Fractions
  4. Unit Fractions on the Number Line
  5. Fractions on the Number Line
  6. Whole Numbers as Fractions
  7. Equivalent Fractions
  8. Comparing Fractions with the Same Denominator
  9. Comparing Fractions with the Same Numerator

Unit 6 Time, Mass and Liquid Volume

3 topics

Tell time to the minute, find elapsed time, and measure mass and volume.

  1. Telling Time to the Minute
  2. Elapsed Time
  3. Mass and Liquid Volume

Unit 7 Area and Perimeter

7 topics

Measure the space inside a shape and the distance around it.

  1. Area with Unit Squares
  2. Area of a Rectangle by Multiplying
  3. Area and the Distributive Property
  4. Area of L-Shaped Figures
  5. Perimeter
  6. Finding a Missing Side
  7. Same Perimeter, Different Area

Unit 8 Graphs and Line Plots

3 topics

Read and make scaled graphs, and show measurements on a line plot.

  1. Scaled Picture and Bar Graphs
  2. Measuring to the Nearest Half and Quarter Inch
  3. Line Plots with Halves and Fourths

Unit 9 Shapes

2 topics

Sort shapes by their attributes and see that categories overlap.

  1. Kinds of Quadrilaterals
  2. Splitting Shapes into Equal Areas
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