Math Ladder · Elementary · Grade 1

Grade 1

Add and subtract within 20 with smart strategies, understand tens and ones to 120, tell time and measure length.

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31 topics in 5 units. Builds on Kindergarten. Leads to Grade 2. Not sure this is the right course? Find your rung.

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Unit 1 Adding and Subtracting within 20

9 topics

Count on, make ten and use doubles to add and subtract within 20.

  1. Counting On to Add
  2. Counting Back to Subtract
  3. Facts within 10
  4. Adding in Any Order
  5. Doubles and Near Doubles
  6. Making Ten to Add
  7. Subtraction as a Missing Addend
  8. Facts within 20
  9. Adding Three Numbers

Unit 2 The Equal Sign and Word Problems

6 topics

Learn what the equal sign means, find missing numbers and solve story problems.

  1. The Equal Sign Means "Same Amount"
  2. True or False?
  3. Finding the Missing Number
  4. Add To and Take From Stories
  5. Put Together and Take Apart Stories
  6. How Many More? How Many Fewer?

Unit 3 Tens and Ones

9 topics

Count to 120, see two-digit numbers as tens and ones, and add within 100.

  1. Counting and Writing to 120
  2. Tens and Ones
  3. Counting by Tens
  4. Comparing Two-Digit Numbers
  5. 10 More and 10 Less
  6. Adding Tens
  7. Adding Ones to a Two-Digit Number
  8. Adding That Makes a New Ten
  9. Subtracting Tens

Unit 4 Length, Time and Data

4 topics

Compare and measure lengths, tell time to the hour and half hour, and sort data into groups.

  1. Ordering by Length
  2. Measuring with Same-Size Units
  3. Time to the Hour and Half Hour
  4. Data in Three Groups

Unit 5 Shapes and Equal Shares

3 topics

Find what makes a shape a shape, combine shapes and split them into equal parts.

  1. What Makes a Shape a Shape
  2. Putting Shapes Together
  3. Halves and Fourths
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