9 Introduce rotations.

1. Explain positive rotation and negative rotation.

2. Introduce key terms.

·        Center of a polygon

·        Rotation

3. Have students practice rotating a triangle around a point using Sketchometry or Geometer’s Sketchpad. Both are tools for use with geometry.

4. Teams brainstorm three bullet points for a message that markets rotations to teens.

Tips and Tools

Highlight Mathematical Practices 1, Use appropriate tools strategically, on the Mathematical Practices Rubric.

See this unit on rotations for ideas on designing the lessons for days 9 and 10.

Have students complete Daily Learning Logs.


10 Continue rotations.

1. Have students practice rotating objects in a coordinate plane.

2. Provide examples of rotations.


11 Introduce rotating an object by x° or y°.

1. Teach a key concept. Rotating an object x° and then by y° differs from rotating an object y° and then by x°.

2. Students practice rotations in pairs or individually.

3. Prepare a short quiz on key terms to be given on Day 12. You can build a quiz for terms and definitions using Quizlet.

Tips and Tools

Allow teams/students time to generate questions and prepare for the quiz.

Students can build and share their own practice quiz for terms and definitions using Quizlet.

Have students complete Daily Learning Logs.  


12 Quiz and Summation Day

1. Begin the day with a short quiz on key terms.

2. Students perform three transformations using Sketchometry or Geometer’s Sketchpad, and submit shapes on projector or directly to you for grading.

3. Students take a preimage and create an image based on rules, then submit image for grading.

Tips and Tools


Have students complete Daily Learning Logs

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