- Author:
- Tracy Rains
- Subject:
- Mathematics, Algebra
- Material Type:
- Lesson Plan
- Level:
- High School
- Grade:
- 9, 10, 11, 12
- Tags:
- License:
- Creative Commons Attribution Non-Commercial
- Language:
- English
- Media Formats:
- Downloadable docs, Interactive, Text/HTML, Video
Percents
Overview
In this lesson you will learn how to convert between decimal, percent and fraction; calculate percent of change; and apply percents to real-world situations. You will be able to discuss the importance of writing numbers in different formats; how to determine a percent increase or decrease; and how percents are an integral part of daily living.
Standards
CC.2.1.HS.F.2
Apply properties of rational and irrational numbers to solve real world or mathematical problems.
MP.1. Make sense of problems and persevere in solving them.
MP.4. Model with mathematics.
MP.5. Use appropriate tools strategically.
Engage
Introductory warm-up activity.
The title of this seminar is Percents - I know you have heard of percents before and I am sure you have used them - whether you realized it or not! So - let’s find out what you know, what you think you will learn about, and then later we will revisit to see what you have learned! Print out - or make your own version in Google Docs or Word - this KWL Chart and fill in the first two columns on this KWL chart. What do you know? What do you think you will learn about in this seminar. Be sure to save it, so you can refer to it when you complete the seminar, so you can review and then fill in the final column!
Explore
Read or watch the resources to learn about this concept, then do the practice activity.
Read | Watch | Do |
What exactly are percents and how are they used? Let’s find out! Here is another explanation of percents. How are fractions, decimals and percents related? Find out here! How do we calculate percentages? Like this! Ok, this is all great to know, but why do I need to know this, when will it be used? Good thing you asked - check this out! | Percent means “of 100” or “out of 100”. So a percent is a fraction of something. Let’s take a look at the relationship between fractions, decimals and percents - be sure to click on any of the other videos mentioned at the end of this clip for more examples. | Ok - so now you are an expert on percents! Let’s work out those brain muscles and calculate somer percents with the following practice activities! |
Explore More
If you are in need of additional information on what a percent is, check this out!
Another resource for understanding percents.
Additional information on converting between fractions, decimals and percents.
This is additional information on how fractions, decimals and percents are related!
This video is another good one for understanding how to go from fraction to decimal to percent. This is a fun song to help you remember!
To find the percent of some number, check out this tutorial! Here is another example.
Calculating percent of change is done this way! Here is another example! Additional examples can be found here, and here!
So, when do we actually use percents? Find out here! More examples of when we encounter percents from day to day - and here- and here!
- Additional practice activities: Activity 1; Activity 2; Activity 3
Explain
Discuss your ideas / opinions / understandings.
What are percents, how are they calculated and where can we find them in our daily routines and activities?
Evaluate
Now it is time to self-check how much you have learned about the this topic. If you do not know as much as you thought, go back to the “Explore” section of this seminar and reread, rewatch, or redo the activities listed. See your facilitator if you have questions.
Click here to take the quiz online. You do not have to log into the quiz site in order to take this quiz. If a window pops up asking you to sign up for the quiz site, just close the sign-up window and start your quiz.
Elaborate
This is a task or project where you can show what you know.
You are in charge of the family birthday dinner this year. It is your job to research the grocery store flyers and website to find the best deal on the meal. You may not have burgers and dogs, you must have either chicken, ham or fish in some form (not chicken nuggets either!). You need to put together a paper containing food item, cost at regular price, any discounts the store is offering, any discounts you may have Bonus cards for, the final cost of the item and the total cost of the meal. You then need to find a similar meal at a restaurant, calculate the cost for your family of 6 to eat out - including tip and tax. You need to then calculate the difference between eating at home or eating out and determine the percent of difference. Make sure to state whether this percent is an increase or a decrease.
Present your information to a family member or classmate and summarize their feedback in one paragraph.
Express
Complete this wrap-up activity where you reflect on your learning.
Revisit your KWL chart and complete the final column - What Have You Learned.