Lesson Plan

Replacing Letters with Numbers

Curated and Reviewed by Lesson Planet

When did letters become the same as numbers? Scholars learn about substituting numbers for letters to evaluate algebraic expressions in the seventh part in a series of 36. The activity focuses on expressions related to geometry, such as for area, perimeter, and volume.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Use Post-It notes to represent substitution by placing numbers over the variables
Classroom Considerations
  • Learners should be aware of area, perimeter, and volume formulas for rectangles and prisms
  • Pupils need to understand the concept of square units
Pros
  • Tables help organize information
  • Professional-looking diagrams provide great visuals
Cons
  • None
Common Core