ALEX Lesson Plans
Subject: Mathematics (9  12), or Technology Education (9  12) Title: Acres Away!
Description: In the lesson students will use a matrix to determine the area of a triangular piece of land. The student will be supplied with state plane coordinates and conversion information to calculate the area and then convert to acres.This lesson plan was created as a result of the Girls Engaged in Math and Science University, GEMSU Project.
Thinkfinity Lesson Plans
Subject: Mathematics Title: Law of Cosines
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Description: In this Illuminations lesson, students use right triangle trigonometry and the Pythagorean theorem to develop the law of cosines. Included is a link to an online activity sheet. Thinkfinity Partner: Illuminations Grade Span: 9,10,11,12
Subject: Mathematics Title: The Law of Sines
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Description: This student reproducible, from an Illuminations lesson, guides students as they use right angle trigonometry to develop the law of sines. Thinkfinity Partner: Illuminations Grade Span: 9,10,11,12

