# ALEX Resources

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 Lesson Plans (3)

ALEX Lesson Plans
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Subject: Mathematics (9 - 12)
Title: Arc Lengths and Sector Areas
Description: Students will work in cooperative groups to discover the relationships between arc length, central angle measure, and circumference.  They will also discover the relationship between circle area, central angle measures, and sector area.  Students will share their discoveries and create formulas for calculating arc length and sector area.  Then they will practice these skills in a journal entry and solving a real-life extension. This lesson plan was created by exemplary Alabama Math Teachers through the AMSTI project.

Thinkfinity Lesson Plans
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Subject: Mathematics
Title: Soda Cans
Description: This reproducible activity sheet, from an Illuminations lesson, guides students through a simulation in which they try different arrangements to make the most efficient use of space and thus pack the most soda cans into a rectangular packing box.
Thinkfinity Partner: Illuminations

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Subject: Mathematics
Title: Circle Packing and Curvature
Description: In this lesson, one of a three-part unit from Illuminations, students investigate the curvature of circles. Students apply definitions and theorems regarding curvature to solve circle problems. In addition, there are links to an online activity sheet and other related resources.
Thinkfinity Partner: Illuminations