Discount/Tax Product Commercial
1 Do Now
Post the link to this Khan Academy video and have the students watch it! Students will watch the video to review the basic steps for solving a problem about growing by a percentage. They will look at the different strategies shown and think about how they relate.
Which strategy do you understand best? How do the two strategies relate? Can you explain to someone else how to do one of the strategies?
2 Check for Understanding
Share the link to a Google Drawing with a chart showing "add", "subtract" and "neither". Place the words tax, tip, discount, markup markdown, sale, percent off, commission... randomly in the chart.
Move the words to the area add, subtract or neither showing how to solve those types of problems.
3 Mini Lesson
Review which words mean to add, subtract or neither in percent word problems. Also go over how to represent a percent increase/decrease by writing it as a decimal. For example a 25% increase can be written as 1.25x where x represents the original price.
Check over your work from the check for understanding chart and take notes on changing a percent increase/decrease to a decimal.
4 Work Time
Using WeVideo, create a commercial for a product of your choosing. Tell us the original price of the project and the discount and tax. Show how to find the new price after converting the percent increase/decrease to a decimal.
Think of a product, price, tax and discount. Create your commercial using WeVideo. Add pictures, screencasts, or videos showing all the necessary work to find the final price of your item.
1) Video must have a picture of your store
2) Video must have a picture of the item you are selling
3) Video must have the price, sale and tax for the item
4) You must show via a screencast how to find the final price of your item OR have the work completely shown in a screenshot from Google Drawing and record a voiceover explaining step by step what you did and which strategy from the Do Now you used!
5) Have a conclusion of your commercial such as saying "for more information call..." or "stay tuned for more amazing sales"
5 Exit Slip Discussion
Tell the students to share the link to their WeVideo commercial in the Google Classroom Stream and add comments to each students work.
Share the link to your commercial and post it in the Google Classroom Stream. Watch each other's videos and add comments on each other's work! Make sure you add one Glow comment and one Grow comment. Your comment should be in the format "Excellent job...Next time..."
Key Standards Supported
Ratios And Proportional Relationships
Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities. For example, “The ratio of wings to beaks in the bird house at the zoo was 2:1, because for every 2 wings there was 1 beak.” “For every vote candidate A received, candidate C received nearly three votes.”
Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship. For example, “This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of sugar.” “We paid $75 for 15 hamburgers, which is a rate of $5 per hamburger.”1
Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.
Make tables of equivalent ratios relating quantities with whole- number measurements, find missing values in the tables, and plot the pairs of values on the coordinate plane. Use tables to compare ratios.
Solve unit rate problems including those involving unit pricing and constant speed. For example, if it took 7 hours to mow 4 lawns, then at that rate, how many lawns could be mowed in 35 hours? At what rate were lawns being mowed?
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.
Use ratio reasoning to convert measurement units; manipulate and transform units appropriately when multiplying or dividing quantities.
Compute unit rates associated with ratios of fractions, including ratios of lengths, areas and other quantities measured in like or different units. For example, if a person walks 1/2 mile in each 1/4 hour, compute the unit rate as the complex fraction 1/2/1/4 miles per hour, equivalently 2 miles per hour.
Recognize and represent proportional relationships between quantities.
Decide whether two quantities are in a proportional relationship, e.g., by testing for equivalent ratios in a table or graphing on a coordinate plane and observing whether the graph is a straight line through the origin.
Identify the constant of proportionality (unit rate) in tables, graphs, equations, diagrams, and verbal descriptions of proportional relationships.
Represent proportional relationships by equations. For example, if total cost t is proportional to the number n of items purchased at a constant price p, the relationship between the total cost and the number of items can be expressed as t = pn.
Explain what a point (x, y) on the graph of a proportional relationship means in terms of the situation, with special attention to the points (0, 0) and (1, r) where r is the unit rate.
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.