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# Markdown Percent Models - What Percent Are You Paying?

Lesson 2 of 21

## Objective: Students will be able to solve discount problems using a percent bar model.

## Big Idea: Visualize it! If something is 20% off - what percent are you actually paying? Bar models help students SEE the discount!

*60 minutes*

#### Launch

*10 min*

**Opener: **As students enter the room, they will immediately pick up and begin working on the opener – Instructional Strategy - Process for openers. This method of working and going over the opener lends itself to allow students to construct viable arguments and critique the reasoning of others, which is **mathematical practice 3**.

**Learning Target: **After completion of the opener, I will address the day’s learning targets to the students. For today’s lesson, the intended target is, “I can solve discount problems using a percent bar model.” Students will jot the learning target down in their agendas (our version of a student planner, there is a place to write the learning target for every day).

**Thoughts from Me! **As a way to dive into percents and create a conceptual understanding, students will utilize a bar model (**mathematical practice 5**). They will use the model to represent scenarios conceptually (**mathematical practice 4**) instead of just punching numbers. Students will also reason abstractly and quantitatively by analyzing what each model represents (**mathematical practice 2**). Students will look for repeated reasoning to make connections within percents (**mathematical practice 8**).

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#### Summary

*5 min*

* To see this part of the lesson unfold, watch: *Classroom Video: Checks for Understanding

Instructional Strategy - Table Discussion: To summarize this lesson, I will have students have a table discussion on: Without drawing a model, discuss with your table how to 20% off of 80. The purpose of this discussion is for students to start using mental percent – again, using a bar model, we are thinking in terms of 10% sections. So if we take off two 10% sections, what is left? I will ask that all tables have a representative share out how their table solved the problem.

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Using this lesson today for my first teaching observation. Gallery walks are a nice way to get my kinestetic learners up and moving.

| 4 months ago | Reply*Responding to Rebecca Gallo*Disregard -- I see that it's "smaller." | 10 months ago | Reply

*I feel silly asking this, but what goes in the first blank on the notes? "When something is marked down, that means that it is a ________ percentage of the total." | 10 months ago | Reply*

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##### Similar Lessons

Environment: Urban

Environment: Rural

###### The Defining Pi Project, Day 1

*Favorites(4)*

*Resources(31)*

Environment: Urban

- UNIT 1: Introduction to Mathematical Practices
- UNIT 2: Proportional Reasoning
- UNIT 3: Percents
- UNIT 4: Operations with Rational Numbers
- UNIT 5: Expressions
- UNIT 6: Equations
- UNIT 7: Geometric Figures
- UNIT 8: Geometric Measurement
- UNIT 9: Probability
- UNIT 10: Statistics
- UNIT 11: Culminating Unit: End of Grade Review

- LESSON 1: Percent Models - A Visual Approach to Percents
- LESSON 2: Markdown Percent Models - What Percent Are You Paying?
- LESSON 3: Markup Percent Models - Percents Over 100?
- LESSON 4: Percent Models Review - Practice, Practice!!
- LESSON 5: Percent Models Test
- LESSON 6: Finding Percents
- LESSON 7: Finding Percents Fluency - It's a Chain Reaction!
- LESSON 8: Multiple Percents - What happens when you have a discount and tax?
- LESSON 9: Markup and Markdown Review - Are you paying more or less?
- LESSON 10: Markup, Markdown, or Just a Percent? TEST
- LESSON 11: Working Backwards with Percents - What happens when a problem is not straightforward?
- LESSON 12: Working Backward with Percent: Practice Makes Perfect!
- LESSON 13: Performing with Percents - Can you bust some common misconceptions?
- LESSON 14: More Practice with Percents - Practice Makes Perfect!
- LESSON 15: Working Backward and Forward...TEST!
- LESSON 16: Percent Change - By What Percent Did the Value Change?
- LESSON 17: Percent Change - More Practice
- LESSON 18: Simple Interest - Understand Your Money!
- LESSON 19: All Percents Review
- LESSON 20: All Percents Test
- LESSON 21: Proportional Reasoning and Percent - Can you apply the concepts? (3 Day Lesson)