1. Enrich Transformations and Polynomials Instruction with Technology Using Geometer’s Sketchpad to Explore Transformational Geometry iLearn Grade 8 Math Session 8.2

2. Focusing Questions What are other strategies of teaching transformational geometry? How can Geometer’s Sketchpad support working with transformations?

3. Instruction

4. 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.

5. 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.

6. Guided Practice Open Reflection.gsp. Create instructions and questions for page 293 of “IMPACT Math” directly in Geometer’s Sketchpad using the text tool.

7. Work Time

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

9. 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

10. 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 chapterRooBooGoo.gsp How is the sketch related to the problem set?

11. Share

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

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

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

15. For more information Office of Instructional Technology oittc@schools.nyc.gov www.nyc.gov/schools