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## Tracy Poulin's 7th Grade Mathematics Class

Middle school mathematics teacher Tracy Poulin leads her 7th grade class through a lesson on ratios and proportional reasoning, in this media gallery from WGBH.

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### Classroom Video

Mathematics teacher Tracy Poulin introduces a problem in which her 7th grade students need to work out what table to sit at to get the most pizza. As students work in groups using different strategies to solve the problem, Ms. Poulin circulates throughout the classroom and checking in.

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### The Problem

Ms. Poulin introduces the problem students will be working on in class. She tells the students to make a guess at first and then use math methods to prove their conjectures.

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### Group 1

A student believes he has a solution to the problem, but his partner proves him wrong using a scale factor.

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### Group 2

Group 2 solves the problem using a graph.

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### Group 3

Ms. Poulin scaffolds for a third group as they work through the problem.

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### Group 4

Ms. Poulin works with a group as they solve the problem using equivalent ratios, a graph, and a rate table.

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### Reflection

Ms. Poulin explains the math practices she uses in her classroom. Ms. Poulin’s students talk about working in groups and sharing.

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### Sharing with the Class

In wrapping up, student representatives from each group explain the strategies they used to solve the problem.

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### Wrap-Up

Anne Collins, Director of Mathematics Programs at Lesley University, discusses the Common Core State Standards, specifically the Standards of Mathematical Practices, as well as the strategies Ms. Poulin used in her classroom.

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## Educational Standards

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