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CK-12 Foundation
Unit Circle: Medieval Castle Defense
Who needs a plan — let trigonometry protect you! Pupils determine the angle of an approaching enemy to a village wall. The scholars determine the exact value of trigonometric functions for the angle. Class members use trigonometry to...
Curated OER
Young Engineers: Understanding Engineering Through Cooking
Second graders explore different engineering careers. In this math lesson, 2nd graders create a winning cooking recipe. They role play a mock cookie sale during the culminating event.