# Lesson 7: Calculating Discounts

Operations with Decimals and Percentages Unit Plan - Year 5 and Year 6 | Lesson 7 | 60 minutes

A 60 minute lesson in which students will calculate percentage discounts of 10%, 25% and 50%.

## Lesson Plan

### Tuning In

- As an introduction to percentage discounts, watch a variety of stocktake sale advertisements on YouTube. Some examples of these include advertisements for the
*Myer Stocktake Sale*, the*Kmart Monster Stocktake Sale*and the*David Jones Mid-Season Sale*(teachers may wish to select advertisements from retailers which are well-known in their particular town or country). After watching, ask the students:- What types of numbers did you see during these commercials?
- What does it mean if the price of an item is ‘50% off’?
- How can customers calculate how much money they will save if they buy an item on sale?

### Teacher Instruction

- Discuss when and where discounts are used in everyday life, as outlined on slide 5 of the
*Calculating Discounts PowerPoint*. Encourage the students to suggest some other examples. - Discuss the definition of a discount, as outlined on slide 6. Explain the two methods which can be used to calculate discounts, as outlined on slide 7.
- Use the annotated examples on slides 8-9 to demonstrate how to calculate discounts using fractions. As a class, complete the example question on slide 10.
- Use the annotated examples on slides 11-12 to demonstrate how to calculate discounts using decimals. As a class, complete the example question on slide 13.

### Guided/Independent Learning

- Display the review questions on slide 14. Monitor and support the students as they individually complete the questions on the slide.
- Display and discuss the answers to the review questions on slide 15. As the students correct their answers, encourage them to raise any queries or concerns.

### Wrapping Up

- Project the
*Dan’s Digital World – Product Brochure*on the board. As a class, calculate the reduction in price on each item if everything in the store was discounted by 10%.

## Differentiation

### Extending Students

- Encourage fast finishers to write their own calculating discounts questions to swap with a partner.

### Supporting Students

- Allow less confident students to complete the review questions in a small group with the support of a teacher or teacher aide.

## Assessment Strategies

Suggested Assessment Strategies

- used strategic whole class or individual questioning
- observed student participation during learning activities
- recorded student progress on a checklist
- annotated student work samples
- collected and reviewed student work samples
- facilitated whole class or peer feedback sessions
- encouraged student self-reflection
- administered formal assessment tasks.

## Resources

#### Common Core State Standards alignment

Grade 6 > Standards for Mathematical Practice > Ratios & Proportional Relationships > Understand ratio concepts and use ratio reasoning to solve problems > CCSS.MATH.CONTENT.6.RP.A.3 > **CCSS.MATH.CONTENT.6.RP.A.3.C**

Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole, given a part and the percent.

## Comments

## Comments & Reviews

Write a review to help other teachers and parents like yourself. If you would like to

request a change(Changes & Updates) to this resource, orreport an error, simply select the corresponding tab above.You must be logged in to post a comment.

## Resource Updates

## Request a change

Would you like something changed or customized on this resource?

You must be logged in to request a change. Sign up now!

## Report an Error

You must be logged in to report an error. Sign up now!

## Help

Are you having trouble downloading or viewing this resource? Please try the following steps:

If you are still having difficulty, please visit the Teach Starter Help Desk or contact us.

Contact us...