Percent Models - A Visual Approach to Percents

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Students will be able to apply percents to real world problems using a percent bar model.

Big Idea

What is percent? What are you actually finding? Using a bar model, students will explore the meaning and value of percent.


10 minutes

As students enter the room, they will immediately pick up and begin working on the opener. My process for openers (Instructional Strategy - Process for openers) is relatively consistent.  The method allows students to construct viable arguments and critique the reasoning of others, which is Mathematical Practice 3

After completion of the opener, I will address the day’s learning targets to the students.  For today’s lesson, the intended target is: I can determine percent of a number using a bar model. Students will jot the learning target down in their agendas. (In my school's version of a student planner, there is a place to write the learning target for every day). 


Thoughts from Me!
As a way to dive into percents and create a conceptual understanding, students will utilize a bar model (Mathematical Practice 5).  They will use the model to represent scenarios conceptually (Mathematical Practice 4) instead of just punching numbers. Students will also engage in Practices 1 and 3, being required to reason together to solve problems without giving up!


5 minutes

To summarize this lesson, I will ask students to have a Table Discussion on the following prompt:

Without drawing a model, discuss with your table how to find 40% of 90. 

The purpose of this discussion is for students to start using mental percent – when we used a bar model, we split the bar into sections of 10 percent.  If a student can identify what 10% is, they can use that to find pretty much every other percent.  I am hoping to hear discussion like – well, 10% would be 9, so 4 times 9 is 36.  I will have each table share out what they discussed at their table.

Here's what happened today: Classroom Video: Checks for Understanding