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End-of-Module Assessment Task: Grade 8 Module 4
8th CCSS: Designed
Connect proportional linear equations and systems. The seven-question assessment is the last installment in a 33-part series. The items cover comparing proportional relationships, slope concepts, and simultaneous linear equations. To...
Inscribed Angle Theorem and Its Applications
9th - 10th CCSS: Designed
Inscribed angles are central to the lesson. Young mathematicians build upon concepts learned in the previous lesson and formalize the Inscribed Angle Theorem relating inscribed and central angles. The lesson then guides learners to prove...
Shortest Line Segment from a Point P to a Line L
9th - 11th CCSS: Designed
One of the hardest skills for many young geometers to grasp is to move beyond just declaring obvious things true, and really returning to fundamental principles for proof. This brief exercise stretches those proving muscles as the class...