discount
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Intro to Percent Change on Jamboard
This post provides details about an artifact that has a manipulative and visual representation of tax rate and discount rate. These contexts are used as an introduction to percent change. The manipulatives are presented on a Google Jamboard. Overview The price or original price is presented as dollar bill. The bill is cut into proportional…
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Sales Price Entry Point
A pseudo- concrete representation of a sales price problem is shown below. This is what I use as an entry point for teaching these problems. The entire shape represents the total price of $80. This is 100%, which in student language is “the whole thing.” The discount rate is 25%. Cut with scissors to lop…
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Making Discount Meaningful
Educators teaching math typically start with the “mathy” stuff first. For example, for finding the sales price teachers may start with showing students the steps to calculate (photo below). I start with the concept, either with a pictorial representation or actual objects to represent the underlying concept. In the photo above, I show an object (related to…
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Engagement Through Individual Interest
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Scaffolding Percent Discount and Tax
This is a snippet of a handout that is a follow up to a previous percent activity that I posted. It walks students through the mathematical steps including subtracting the price. I found that the cutting part of the previous activity was effective but the steps were not as clear. This handout is an…
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Percent Discount Scaffolded and Concrete
I continue to be surprised at how much of a challenge computing percent discount is for students. It’s prior knowledge. If you ask them to explain what a discount is in their own words you’ll get a response like “it makes something cost less.” The students may even have mastery of computing a percent of…
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Conceptual Understanding