Solving Quadratic Equations: Cutting Corners

A little background

  • In case you are trying the MARS MAP Classroom Challenges for the first time, it is recommended that you read the Brief Guide for teachers and administrators before you get started.
  • Before the lesson students attempt the problem individually. You then review their work and write questions for students to answer to help them improve their solutions.
  • At the start of the lesson, students work alone, answering your questions.
  • Students are then grouped, and work collaboratively on the same task.
  • In the same small groups, students are given some sample solutions to comment on and evaluate.
  • In a whole-class discussion, students explain and compare the different solution strategies they have seen and used.
  • Finally, students review what they have learned.
  • Additional resources for this lesson include: solving_quadratic_equations_slides_ms.ppt

Objectives

  • To help you assess how well students are able to solve quadratics in one variable.
  • To help you identify and help students who have the difficulty of making sense of a real life situation and deciding on the math to apply to the problem.
  • To help you identify and help students who have the difficulty of solving quadratic equations by taking square roots, completing the square, using the quadratic formula, and factoring.
  • To help you identify and help students who have the difficulty of interpreting results in the context of a real life situation.
90 mins HSA.REI.B.4B HSA.REI.B.4A K-12.MP.1 K-12.MP.2 K-12.MP.3 K-12.MP.4 HSA.REI.B.3 HSA.REI.B.4 HSG.SRT.C.6 HSG.SRT.C.7 HSG.MG.A.2 HSG.MG.A.3 HSA.REI.D.11 HSG.SRT.C.8 HSG.MG.A.1
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