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4.G.A.2
Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.
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Recent Blog posts:
- Vlog Ep #10: Involving Parents in Their Children’s Math Education
- Vlog Ep #09: Fake Math and Pseudocontexts
- Vlog Ep #08: Teaching Math Unshackled from Standards and Curriculum Documents
- Vlog Ep #07: How to Use Technology to Teach K-6 Math
- Vlog Ep #06: Look Around You for Real Life Contexts for K-6 Math
- Vlog Ep #05: Kids Figure Stuff Out (And What That Means For Math Education)
- Vlog Ep #04: Math-Anxious Parents Produce Anxious Kids Who Know Less Math (research report)
- The Most Challenging K-6 Math Topic (Survey Results)
- Teach Times Tables Without Apologies
- Math is Important, REALLY Important
- Math in the News: Babies Can Do More Math Than We May Have Realized
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- K-6 Math in the News: Schools Failing to Recognize Kids Who Don’t Fit In?
- K-6 Math in the News: Supermarket Math Fails
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- K-6 Math in the News: Everyone CAN Succeed at Maths
- K-6 Math in the News: Facebook Flower Math Puzzle
- Sixth-Graders Learn Business Skills in Mathematics Class
- Asian Kids Beat Out the West in Math Again
- Teach Measurement Using a Rain Gauge
- Teaching a Great Math Lesson Part 1: Capture Students’ Attention!
- Welcome to Professor Pete’s Classroom
