Challenge Math 7: Percent of Change (6.5 Course 3) Danielle Cole

I. Common Core Standard: Mathematics 7.RP.3 Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.

II. Behavioral Objective: The learner will understand how to calculate a percent of change increase and decrease with 80% accuracy. The learner will be able to identify and calculate real world problems that are either a percent increase and/or a percent decrease.

III. Anticipatory Set: POD “If gas was $3.18 a gallon yesterday, and today the price was $3.33 what is the percent of change?” This will be a discovery intro. The students are advanced so they may or may not already know this formula. This will go into our notes section of going over examples.

IV. Objective/Purpose: “Today we will be learning how to calculate percent of change. The goal of this lesson is to be able to calculate percent increases and decreases in real world applications.”

V. Input: A. Task Analysis: 1. On the board/Elmo do POD. 2. Transition into lesson, have students get out their notebooks. 3. Have students follow along and fill in their notes. Go over vocab: percent of

change. 4. Do a couple of example problems on the board, students should be writing

them down in notes. 5. Let students try an example and check for understanding as students work on

problem. 6. Now break up into pairs and hand out real world problems that have an

increase or decrease in price. Each group of pairs will get a different problem to solve.

7. Allow students to figure out and work together on problem. 8. After students have finished, students will share what they found, either an

increase or decrease in price of a product and by how much. 9. Exit Pass: Transition back into seats and have students reflect on what they

think prices might be like in the future, will they keep increasing? Or will some products become cheaper? Smaller or bigger percent changes?

B. Thinking Levels: 1. Knowledge: Students will know how to calculate a percent increase and

percent decrease. 2. Application: Students will understand how this relates to every day life using

real world applications. 3. Evaluation: Students will reflect on how they think prices of consumer

products will change in the future. C. Learning Styles: 1. Auditory: Students will hear teacher’s instruction on how to calculate percent

of change.

Challenge Math 7: Percent of Change (6.5 Course 3) Danielle Cole

2. Visual: Students will see teacher’s example problems on how to calculate percent of change.

3. Kinesthetic: Students will have an opportunity to get up and move and work with another student on a real world application and then will have the opportunity to present their findings.

D. Methods and Materials 1. Ways of Presenting: Elmo for POD, on whiteboard teacher will write notes

and do example problems, students will present in groups what they found from doing their real world problem.

2. Elmo, POD, note cards for reflection, real world example problems on handouts, Google Chrome books, instructions on how to do Glogster homework assignment.

VI. Modeling: 1. Show students how to calculate percent of change and real world application

of this concept. VII. Checking for understanding:

1. During POD and when pairs present their findings of percent change. 2. Exit pass/reflection students will show their thinking and understanding of the

concept to the real world. VIII. Guided Practice

1. Students work in pairs on real world problems while teacher comes around and checks for understanding.

IX. Independent Practice 1. Homework can be started in class if there is time. Google Chrome books are

available to start online Glogster homework. 2. http://tapico0809101112.edu.glogster.com/percent-of-change

X. Closure

1. Repeat learning goal, have students reflect on real world application of concept using exit pass.

!Current Price: 59 cents per 1 pound 1950s Price: 39 cents per 2 pounds Find the percent of change of the price. Is it an increase or decrease?

Current Price: $2.99 for 10 pounds 1950s Price: 35 cents for 10 pounds Find the percent of change of the price. Is it an increase or decrease?

Current Price: $22,757 1950s Average Price: $1,510 Find the percent of change of the price. Is it an increase or decrease?

Current Price: $259.99 1950s Price: $339.95 Find the percent of change of the price. Is it an increase or decrease?

During the winter, Mrs. Bogema was measuring how much snow had fallen each week. Week 1 had an accumulation of 1.75 inches. Week 5 had an accumulation of 18.1 inches. What is the percent change in snowfall from week 1 to week 5?

During the summer, Ashley went to the beach to go swimming, but couldn’t because the waves were 8ft tall. The next day Ashley went to the beach to see if it was safe enough to swim, the waves were 2.5 ft tall. What is the percent change in the height of the waves from day 1 to day 2?

Nick has $54.27 in his bank account. Nick had to pay for repairs for his car and before the repair costs he had $331.29 in his bank account. What is the percent change in his bank account? Did the amount increase or decrease? When Ms. Cole first got her pet turtle it had a shell length of 1 inch. After 2 years Ms. Cole’s turtle has a shell length of 6 inches. What is the percent change in growth?

Ms. Cole is trying to sell her bike on ebay. Look at the bids and find the biggest AND smallest percent of change of the price. Make sure you calculate the percent of change of the price and not just the differences in prices.

Last year for Halloween, Mrs. Bogema’s sons brought home 147 pieces of candy. This year her sons brought home 232 pieces of candy. What is the percent of change? Is it an increase or decrease?

In the presidential election of 2000 there were 105,594 voters. During the election 2012 election there were 130,292 voters. What is the percent change of voters? Is it an increase or decrease?

Glogster Homework: Percent of Change NAME:_______________________

Go to the following link http://tapico0809101112.edu.glogster.com/percent-of-change Instructions: Your homework is on the Percent of Change Glogster. There are 8 problems you need to do. To show that you did the homework you MUST write down the problems and SHOW all work on a piece of paper. Click the DO MATH image for a game, you need to record your high score. The game is NOT optional you MUST record your high score. If your internet doesn’t work then do__________________________

Glogster Homework: Percent of Change NAME:_______________________ Go to the following link http://tapico0809101112.edu.glogster.com/percent-of-change Instructions: Your homework is on the Percent of Change Glogster. There are 8 problems you need to do. To show that you did the homework you MUST write down the problems and SHOW all work on a piece of paper. Click the DO MATH image for a game, you need to record your high score. The game is NOT optional you MUST record your high score. If your internet doesn’t work then do__________________________