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