Lesson Plan

Solving a System by Substitution

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This Solving a System by Substitution lesson plan also includes:

Solving systems by substitution can be a challenging topic in algebra I. Here is a lesson that builds on students' understanding of intercepts to begin the process of substitution, and all work is reinforced graphically to build confidence. To conclude the lesson, an activity is provided to extend learning to a parabola-line system.

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CCSS: Adaptable
Additional Tags
Classroom Considerations
  • Graph paper is required to be able to graph systems to verify solutions
Pros
  • Solving systems is presented as an extension of finding linear intercepts; building from this prior knowledge helps individuals see substitution as a known skill
  • Clear, step-by-step solutions are offered for each example problem covered in the lesson
Cons
  • An answer key is not provided for the warm-up exercises
Common Core