# Elementary School Math Lessons

In Spring 2020, I developed and delivered guest lectures for a group of second graders:

**Areas.** An introduction to the area formulas for rectangle, parallelogram, and triangle.
[pptx]
[Video]

**Pythagorean Theorem.** An introduction to the proof of the Pythagorean Theorem using cutting and rearranging. [pptx]

**Peano's Axioms.** [pptx]

**Proofs with Peano's Axioms.** Proofs of addition properties. [pptx]