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 Lesson Plans (3) Interactives/Games (2) Learning Activities (2) Teacher Tools (1)

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: 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

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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

Web Resources

Interactives/Games

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https://itunes.apple...
Create geometric shapes, explore/change their properties, and calculate metrics.

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Geometry Step-by-Step
http://agutie.homest...
This site provides a mix of sound, science, and Incan history in order to raise students' interest in Euclidean geometry. Visitors will find geometry problems, proofs, quizzes, puzzles, quotations, visual displays, "scientific speculation", and more.

Learning Activities

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Geometry Step-by-Step
http://agutie.homest...
This site provides a mix of sound, science, and Incan history in order to raise students' interest in Euclidean geometry. Visitors will find geometry problems, proofs, quizzes, puzzles, quotations, visual displays, "scientific speculation", and more.

Teacher Tools

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Geometry Step-by-Step
http://agutie.homest...
This site provides a mix of sound, science, and Incan history in order to raise students' interest in Euclidean geometry. Visitors will find geometry problems, proofs, quizzes, puzzles, quotations, visual displays, "scientific speculation", and more.

Thinkfinity Learning Activities

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Subject: Mathematics
Title: Soccer Problem
Description: This student interactive, from an Illuminations lesson, allows students to investigate a soccer problem by changing the location of a soccer player as well as the distance between the player and the goal posts. The angle changes as the player is moved, and students must therefore determine the player s position so that the angle is maximized.
Thinkfinity Partner: Illuminations