Real-life Systems 5 - Price-Sum Plus One Other

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SWBAT solve systems of equations modeling real-life situations (Day 5 of 5)

Big Idea

Get deep into algebraic thinking by solving problems that aren't so straightforward. A tricky one pushes kids to think algebraically.


10 minutes

Each day, students complete a Warmup that consists of spiraling the previous day's material, in addition to older material.  Warm-up problems also sometimes extend lessons that students have encountered before to more unfamiliar contexts. Today's Warmup challenges learners to demonstrate algebraic reasoning.

For a video narrative about how I structure each lesson, and how the warm-up fits in, click here.

Play of the Day

40 minutes


10 minutes


15 minutes

The Homework includes four problems that assess students' ability to work independently on the content of this week's lessons.  I also give the kids the answers to the problems.