Lesson Plan for Percent Project Day 1



Lesson Plan for Percent Project Day 1

Learning Objectives:

• TLW be able to find percentages using percent equations

• TLW be able to calculate simple interest

Lesson Activities:

• Start with weekly WOW for five minutes

o Since it is Monday, students receive new vocabulary words, come up with definitions for the words within their groups. After five minutes, we come together as a class, and I ask the students to read what they came up with. The two words aligning with the lesson were percent and rate. Students volunteered willingly and came up with percent easily. For rate (a word they have previously had in our lessons), the students gave many examples of a rate instead of a general definition. I guided them towards a definition by asking them to put all of their examples into more general terms.

• Students were given the percentage notes (day 1) for percent equations and simple interest. Students look at the example 23%. They are asked what this means and how it can be written as a decimal.

o Next, students are asked “What is 23% of 60?” They work independently and in small groups (at their tables) for a couple of minutes.

▪ If this lesson was re-taught, it would be helpful to have the students quickly make predictions of what they think the amount will be before they work on the question.

o I circulate the room during this time and observe what students have come up with. A student comes up to the board and demonstrates how she found the answer (0.23*60=13.8) She explains to the class how she got this and even helps to formalize the percent equation (% times “of” equals “is”), which I was not expecting. She may have received assistance from another adult in the room on the formal equation, but hearing from a fellow student seemed to be helpful for the other students.

• Students work independently or in small groups at their tables to do a couple of the practice problems on the notes I have chosen.

o I chose to only have them do practice problems 1 and 5 because they seemed to be getting it and those two problems required them to find a different piece of the percent equation. Students must use the percent equation format to solve them.

o If the class seemed to be struggling with the percent equation it would be possible to choose more of the practice problems for the students to work on.

o Walking around, I found that most students were getting it, and decided to go over “What percent of 80 is 18?” with the students participating in how to solve it.

• Next, we moved on to the next page for finding simple interest, which has the equation for calculating it. Ideally, we would have done more exploration before just giving the formula, but did not have enough time to do this.

o “Who has a savings account at the bank?” Talk about how banks give you interest on your money in your savings account. A student read the beginning paragraph describing the variables in the equation to the class. Have the students work on the first practice problem and are told to try the second one if they get done.

o Go over the first practice problem as a class and take any questions. The only question was about how to come up with the decimal, and students recognized that it is the interest rate percent put into the form of a decimal, which we talked about a few minutes ago on the other page.

• Introduce the project by passing it out and explaining the basic idea of what we are doing.

o “We will choose a company to work for and calculate our budgets. We will be using percent equations and variables throughout ALL of the packet. You are going to choose a car, a place to live, choose your expenses, etc.”

o Start by having the students choose a company to work for (give them 30 seconds). Then allow them to start working on the project. They can work with each other, if they choose to do so.

o For the rest of the class period, I walk around and listen in on table conversations and answer any questions. As the students started, many were not using the percent equations and defining variables, so we had to stop the class and tell them they must include these things in their packet.

o Homework is to finish the packet through their expenses page

Percent Equations and Simple Interest

(4-3)

Objectives:

• To write and solve percent equations

• To calculate simple interest

A percent is a ratio that compares a number to 100. For example, how can we write 23% as a ratio? What decimal is this?

What does a percent equation look like?

______________ = _________

Practice:

1. What percent of 80 is 18? 2. What percent of 40 is 30?

3. Find 85% of 320. 4. Find 30% of 40

5. 393 is 60% of what number?

Simple interest (I) is calculated using the principal (starting amount, p), the rate (r), and the time (in years, t ). We can calculate this using the following equation for simple interest.

I = prt

Example: Suppose your bank is offering you 3% simple interest on savings accounts. If you deposit $1,540 into the account, how much interest do you earn in 8 years? How much money will you have total?

Example: You have decided to buy a laptop for yourself. The laptop you have chosen costs $1,036. However, you realize that you only have $240. Luckily, your parents have agreed to lend you the rest of the money, using simple interest at a rate of 4% over 3 years. How much money will you have to pay back to them total?

Percent Change

(4-4)

Objectives:

• To find percent of change

Percent of change is the ratio of the amount of change over the original amount expressed as a percent

When a value:

increases from its original amount, it is the ____________________

decreases from its original amount, it is the ___________________

_________________________________________________________

Finding Percent of Change

Percent increase/decrease = ______________________

Practice:

The price of a sweater decreased from $29.99 to $24.99. Find the percent of change.

Find the percent of change is the price of a CD increases from $12.99 to $13.99. Round to the nearest percent.

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download