Task Teacher Guide
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In This Purposeful Practice…
Intentionality…
- Percent is a comparison measured out of 100;
- decreasing by a percentage will lower the original value.
- increasing by a percentage will increase the original value.
- A percentage decrease, followed by a percentage increase of the same value will result in a change of value.
- Reducing a value by 20% is the same as retaining 80% of the value.
- Increasing a value by 20% is the same as 120% of the original value..
- To solve percent related problems we can use the following strategies:
- Analyze Between and Within Ratios (Scaling Up or Down);
- Find a Unit Rate
Visual Number Talk
String of Related Problems
Would you rather use: a $30 off coupon or a 30% off coupon.
Bear #1: $40 Bear #2: $80 Bear #3: $140 Bear #4: $96 Bear #5: $250
Consider watching this silent solution animation to help you prepare to facilitate this math talk utilizing a double number line to model possible solutions.Visual Math Talk Prompt #1
Which coupon would you rather use?


Visual Math Talk Prompt #2
Which coupon would you rather use?


Visual Math Talk Prompt #3
Which coupon would you rather use?


Visual Math Talk Prompt #4
Visual Math Talk Prompt #5
Purposeful Practice
While Students Are Practicing…
Purposeful Practice
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Resources and Downloads
Lesson Tip Sheet

Videos & Images

Keynote Slides

PowerPoint Slides

Printable Handout

Explore The Entire Unit of Study
This Make Math Moments Task was designed to spark curiosity for a multi-day unit of study with built in purposeful practice, and extensions to elicit and emerge mathematical models and strategies. Click the links at the top of this task to head to the other related lessons created for this unit of study.Visual Math Talk Prompt #1
Visual Math Talk Prompt #2
Visual Math Talk Prompt #3
Visual Math Talk Prompt #4
Visual Math Talk Prompt #5
Question #1
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Question #2
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Question #3
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Question #4
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Download Editable/Printable Handout
Become a member to access purposeful practice to display via your projector/TV, download the PDF to upload to your LMS and/or print for students to have a physical copy