## Task Teacher Guide

Be sure to read the teacher guide prior to running the task. When you’re ready to run the task, use the tabs at the top of the page to navigate through the lesson.### 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

Again, facilitating this based on student thinking and modelling on the board for all to see is helpful here rather than simply playing the silent solution animation. As you progress through each of the prompts you may want to consider highlighting and alternating different strategies.Which coupon would you rather use?

### Visual Math Talk Prompt #3

Again, facilitating this based on student thinking and modelling on the board for all to see is helpful here rather than simply playing the silent solution animation. As you progress through each of the prompts you may want to consider highlighting and alternating different strategies.Which coupon would you rather use?

### Visual Math Talk Prompt #4

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### Visual Math Talk Prompt #5

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## Purposeful Practice

### While Students Are Practicing…

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### Purposeful Practice

**Login/Join to access one (1) additional Math Talk Prompt as well as the Teacher Guide, downloadable slide decks and printable handouts for this lesson and all problem-based units.**We suggest collecting this reflection as an additional opportunity to engage in the formative assessment process to inform next steps for individual students as well as how the whole class will proceed.

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## Resources and Downloads

## Lesson Tip Sheet

Download the lesson plan in PDF format so you can keep it handy and share with colleagues. JOIN TO DOWNLOAD## Videos & Images

Download the videos, images, and related media files to your computer to avoid streaming. JOIN TO DOWNLOAD## Keynote Slides

Download in Apple Keynote format to avoid streaming video and run the lesson smoothly. JOIN TO DOWNLOAD## PowerPoint Slides

Download in Microsoft PowerPoint format to avoid streaming video and run the lesson smoothly. JOIN TO DOWNLOAD## Printable Handout

Download/Edit the handout so you can keep it handy and share with colleagues. JOIN TO DOWNLOAD## 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

### Question #4

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