This document outlines a peer teaching project for a 4th grade math class at an international school in Brazil. Students will work in pairs to create 1-minute math lesson videos explaining concepts they have learned, such as addition, subtraction, and rounding. The goals are for students to demonstrate their understanding of concepts well enough to teach classmates, and for the videos to be a review resource. Students will select topics, plan and record their lessons, then upload them. They will improve their math teaching and technology skills over the course of producing multiple videos each month. The teacher will review lessons for accuracy before and after recording.