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Addition Within 20

1st Grade • Half Day Lesson Plan
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Lesson Plan Description

This half day lesson plan is broken down into 2 separate segments (30-60 minutes each) addressing Operations and Algebraic Thinking: Addition within 20 (1.OA.6). These lessons include guided and independent practice of adding using counting on, making ten, making easier known sums, using number grids, and using number lines, and 3 games to reinforce these concepts.

  • Segment 1: students will use different strategies such as counting on, making ten, making easier known sums, and using number grids and number lines to solve addition problems.
  • Segment 2: students will play 3 games: “Addition War,” “Solve and Cover,” and “Roll and Race” to practice addition within 20.

These lessons can be taught over the span of a half day or you can use the lessons independently, broken up over several days.