Rule Breaker Worksheet
A 2nd-grade worksheet where students test 10 different quadrilaterals using a right-angle checker. They color rectangles green and non-rectangles red, focusing on the 4 right angles rule.
Shape Detective Slides
A slide deck for a 2nd-grade geometry lesson that guides students through a warm-up, a video on rectangle characteristics, and instructions for the 'Corner Test' activity. Includes the YouTube video embed.
Detective Dossier Teacher Guide
A comprehensive teacher guide for the Shape Detectives lesson, including pacing, discussion prompts, material checklists, and common misconceptions for 2nd-grade geometry.
Angle Checker Tool
A printable page of 'Angle Checker' tools, designed to be cut out and used as index-card substitutes. These tools help students physically verify right angles in the 'Shape Detectives' lesson.