Grade 6 · Unit 11

Area of Rectangles & Triangles

Why the formulas hold

Curriculum standard — Represent stage of the Thinking Ladder

Multiple representations

The symbolic form of this concept.

Three pathways, one topic

Study area of rectangles & triangles at three depths

Grade/course-level problems with full understanding.

Parameters, multiple representations, proof, and modeling.

Non-routine problems and competition applications.