SUB! How can we use the properties of algebra to figure out the intersection of two lines WITHOUT graphing? (Day 1 of 3)

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Objective

SWBAT solve systems of linear equations by substitution.

Big Idea

SUB! How can we use the properties of algebra to figure out the intersection of two lines WITHOUT graphing?

Warm-up

10 minutes

Each day, students complete a warm-up that usually 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.

 

In today's case, I use Jack and Jill to review applying the concept of systems while simultaneously hitting the idea of constructing functions.  I find it's encredibly useful to have kids see real-world applications day after day, consistently, rather than just on one "word problem day."  I feel this fluid movement between application and procedural fluency creates the balance called for in the Common Core.

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

 

Huddle

10 minutes

Homework

15 minutes

The homework file is a resource that generally includes 5-7 problems that consist of problems related to this lesson, as well as spiraled review.  I also give the kids the answers to the problems. 

Sometimes, the HW file is a take-home assessment.