Take some time to reflect on graphing. Learners count a point's distance from the line of reflection to create reflections of geometric figures. Given the rules for four basic lines of reflections, pupils determine the points to create the image of a figure. Scholars practice both methods of reflection during the instruction and afterward with the worksheet.

Concepts

reflections, y-axis, x-axis, horizontal line, vertical lines, coordinate plane, transformations

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Instructional Ideas

• Review equations of vertical and horizontal lines

Classroom Considerations

• The hook section of the video has no audio but does not distract from the instruction
• Second lesson in a four-part unit on transformations

• This video is hosted on YouTube

Pros

• Encourages learners to pause the video and work the examples
• Answer key uses color to distinguish between the image and the pre-image

Cons

• None

Common Core

HSG-CO.A.2 HSG-CO.A.5