ALEX Lesson Plans
Subject: Mathematics (9  12) Title: You can die now or "dilate R to R'"
Description: This lesson will teach students to not only create a dilation, but also assist them in understanding the relationship of similarity between a figure and its image through a dilation. Students will use an online math tool to adjust the location of the point of dilation, and they will find the scale factor changes when the point of dilation moves. Students will also find that parallel lines can be used to create a dilation.
Thinkfinity Lesson Plans
Subject: Mathematics Title: Scale Factor
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Description: This student interactive, from Illuminations, allows the user to investigate the changes in area and perimeter when the side length is doubled, tripled, or quadrupled. Thinkfinity Partner: Illuminations Grade Span: 6,7,8,9,10,11,12
Subject: Mathematics Title: Square Graphs
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Description: This student interactive, from an Illuminations lesson, allows students to view six different graphs. Each graph plots one characteristic of the square along the horizontal axis and another along the vertical axis. Students then determine which two characteristics are used to make each graph. Thinkfinity Partner: Illuminations Grade Span: 9,10,11,12
Subject: Mathematics Title: Symmetries I
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Description: In this unit of four lessons, from Illuminations, investigate rotational symmetry. They learn about the mathematical properties of rotations and have an opportunity to make their own designs. Thinkfinity Partner: Illuminations Grade Span: 9,10,11,12
Subject: Mathematics Title: Symmetries II
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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 Grade Span: 9,10,11,12

