Reflections 3

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SWBAT understand reflection across the lines y = x and y = -x.

Big Idea

Push students' understanding of reflections by reflecting across diagonal lines. Tricky!!!! (and some cool patterns emerge).

Warm Up

10 minutes

Each day, students complete a warm-up that usually consists of spiraling the previous day's material, in addition to older material.  Warm-up problems also sometimes extend lessons that students have encountered before to more unfamiliar contexts.

For a video narrative about how I structure each lesson, and how the warm-up fits in, click here.

Play of the Day

40 minutes


10 minutes

For the huddle, I like to review #4, #5, and #6, because they are asking questions that do not have a diagram.  For some kids, they apply the abstract rules of a reflection across y=x, but I encourage all the kids to sketch their own visuals for this... which is really powerful for anything involving geometry.

We practice this sketch for all three examples, and I spiral this strategy for the next few days, pretty diligently.


15 minutes

Homework should be completed at home and should take students approximately 15 minutes.