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Can the slower cyclist stay ahead?

8th GradeSystems of equationsabout 2 minCCSS 8.EE.C.8.aCCSS 8.EE.C.8.b

Zoe has a head start. Max rides faster. Guess who stays ahead, then build your own race.

Lesson Plan

Solve systems of linear equations by graphing, with the head start as the y-intercept and the speed as the slope.

  1. Question: Ask what students spot and what they are curious about. Read “One minute in, who's ahead?” aloud. Have each student guess and say why.

  2. Question: Read “Which change would you like to try?” aloud. Have partners explain their guesses to each other.

  3. Question: Read “When do they tie?” aloud. Ask a student who guessed differently to explain.

  4. Your turn: Have students try their own. Ask them to predict before they test.

How to run it

  1. Whole classPut the lesson on the board. At each choice the class votes, then you select the winner.
  2. SoloShare the link, QR code, or post to Google Classroom. Each student gets to take their own path.