Jeff Li MTP KIPP Infinity Charter School, NEW YORK, NY
8th Grade Math : Unit #8 - CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS : Lesson #16

Series of Transformations that Lead to Similarity

Objective: SWBAT understand what happens when a series of translations, reflections, rotations, and/or dilations is performed on a figure.
Standards: 8.G.A.1 8.G.A.1a 8.G.A.1b 8.G.A.1c 8.G.A.2 8.G.A.3 8.G.A.4 MP1
Subject(s): Math
60 minutes
1 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.

3 Huddle - 10 minutes

For the huddle in this lesson, I ask kids to come up with multiple ways to demonstrate compound transformations, and it's really cool the kinds of things they come up with.

 See the student samples for some ideas.

I push kids also to be VERY precise about their explanations... how much of a translation?  In which direction?  Reflection over what line, exactly?  This is really, really important.

Student work samples - creativity! 2
High Quality Task

In this unit, I LOVE using student work samples to demonstrate creativity, inspire other students, and even learn myself, as the kids never cease to amaze me with their brilliance.

It also reinforces the idea of solving something in multiple ways... and students get to see how the four transformations relate to each other.

Check out the attached samples in the resource section.

4 Homework - 15 minutes

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