# ALEX Lesson Plan Resources

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ALEX Lesson Plans
Subject: Mathematics (7 - 12)
Title: Falling Down a Rabbit Hole Can Lead to a King Sized Experience - Exploring Similar Figures Using Proportions
Description: In this lesson, students will explore the concept of similarity.  Students will first simplify ratios, solve proportions using the cross product property, and use properties of proportions to solve real-world problems.  Similar polygons will then be introduced and their properties used to solve real-world problems.

Subject: Mathematics (9 - 12), or Technology Education (9 - 12)
Title: I Can Determine The Height Of A Rocket!
Description: The lesson is intended to give students a fun real-world experience in applying their math skills. They will use trigonometric ratios to calculate heights of tall structures. They will also use the Internet to convert their calculations from standard to metric units and visa versa.

Thinkfinity Lesson Plans
Subject: Mathematics
Title: Covering the Plane with Rep-Tiles      Add Bookmark
Description: In this lesson, from Illuminations, students discover and explore a special kind of tiling of the plane. Rep-tiles are geometric figures such that n copies can fit together to form a larger, similar figure. Students experiment with various shapes and values of n. Spatial sense is encouraged by the need to visualize and perform transformations with the shapes involved.
Thinkfinity Partner: Illuminations

Subject: Mathematics
Description: Students will recognize dihedral symmetry and reflections in figures and examining various symmetries.
Thinkfinity Partner: Illuminations

Subject: Mathematics
Title: Relating Rotations to Symmetry      Add Bookmark
Description: In this lesson, one of a multi-part unit from Illuminations, students investigate the relationship between rotations and the symmetry in a figure or a design. They use an interactive Java applet to illustrate rotational symmetry and investigate cyclic designs and point symmetry.
Thinkfinity Partner: Illuminations

Subject: Mathematics
Description: In this unit of four lessons, from Illuminations, students use Java applets to investigate reflection, mirror, or bilateral symmetry. They learn about the mathematical properties of mirror symmetry and have a chance to create designs with mirror symmetry.
Thinkfinity Partner: Illuminations

Subject: Mathematics