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How can sound make silence?

Algebra 2Transforming functionsabout 3 minCCSS HSF.BF.B.3CCSS HSF.BF.A.1.b

Add a plane's hum to a flipped copy of itself, then slide the copy late and hear what happens.

Lesson Plan

Explore reflections and horizontal shifts of functions by adding a sine wave to a transformed copy.

  1. Question: Ask what students spot and what they are curious about. Read “Hum plus its flipped copy: what do you hear?” aloud. Have each student guess and say why.

  2. Question: Read “Half a wave late: what do you hear?” aloud. Have partners explain their guesses to each other.

  3. Big idea: Pause. Ask a student to say the idea in their own words.

  4. Real-world application: Ask: Where else have you seen this?

  5. 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.