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Addition Within 100

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 (60 minutes each) addressing Numbers in Base-Ten: Addition within 100 (1.NBT.4). These lessons include: key place value vocabulary, guided and independent practice of concepts, and participate in a craft to reinforce the concept of addition within 100.

  • Segment 1: students will add 2-digit plus 1 digit, 2-digit plus multiple of 10, explain their reasoning on why they had to regroup when adding, and use drawings or base 10 blocks to represent their addition problem.
  • Segment 2: students will add 2-digit plus multiple of 10 and create a donut craft representing tens and ones in an addition problem.

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