Enrich Transformations and Polynomials Instruction with

Technology

Using Geometer’s Sketchpad to Explore Transformational

Geometry

iLearn Grade 8

Math Session 8.2

Focusing Questions

What are other strategies of teaching transformational geometry?

How can Geometer’s Sketchpad support working with transformations?

Instruction

Framing The Session

You have used the SmartBoard and virtual protractor to do transformations. Now, you will focus on using Geometer’s Sketchpad to accomplish this.

Teaching

Open to page 290, PS A, in “IMPACT.”

Together we will follow the steps in the handout “Steps to Modify a Premade GSP Sketch” to complete the Problem Set.

Guided Practice

Open Reflection.gsp.

Create instructions and questions for page 293 of “IMPACT Math” directly in Geometer’s Sketchpad using the text tool.

Work Time

Getting Started

Working in small groups, explore the following sketches and discuss how they relate to the problem sets indicated.

Work Time

How is the sketch related to the problem set?

Impact Math Chapter/Problem Set GSP Sketch

5.1 PS C Reflect.gsp

5.2 PS B Rotation symmetry.gsp

5.2 PS E Rotate.gsp

5.3 PS A Translate.gsp

5.3 PS C ReflectIntersecting.gsp

5.3 PS D Threeflect.gsp

Work Time (cont’d)

Impact Math Chapter/Problem Set GSP Sketch

Lab Investigation Glide reflect tiling.gsp, Triangle tiles.gsp, Twisted triangles.gsp, Tumbling blocks.gsp

5.5 PS B Coordinate Reflect.gsp

5.5 PS D Coordinate Translate.gsp

Whole chapter RooBooGoo.gsp

How is the sketch related to the problem set?

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Let’s look at some of the questions and instructions you created.

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How can Geometer’s Sketchpad help develop skills in transformational geometry?

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How does this session address different strategies of teaching transformational geometry?

Answers

For more information

Office of Instructional Technology

oittc@schools.nyc.gov

www.nyc.gov/schools