Algebra 2Trigonometric functionsabout 2 minCCSS HSF.TF.B.5Choose trigonometric functions to model periodic phenomena with specified amplitude, frequency, and midline.CCSS HSF.TF.A.2Explain how the unit circle in the coordinate plane enables the extension of trigonometric functions to all real numbers, interpreted as radian measures of angles traversed counterclockwise around the unit circle.CCSS HSF.IF.B.6Calculate and interpret the average rate of change of a function (presented symbolically or as a table) over a specified interval. Estimate the rate of change from a graph.+0
When does the sea rise fastest? Guess, then run a day of tides.
Lesson Plan
Model periodic data with a sine function, then find where its rate of change is greatest.
Question: Ask what students spot and what they are curious about. Read “When does it rise fastest?” aloud. Have each student guess and say why.
Big idea: Pause. Ask a student to say the idea in their own words.
Question: Read “High tide at noon. When's the next?” aloud. Have partners explain their guesses to each other.
Real-world application: Ask: Where else have you seen this?
Your turn: Have students try their own. Ask them to predict before they test.
How to run it
Whole classPut the lesson on the board. At each choice the class votes, then you select the winner.
SoloShare the link, QR code, or post to Google Classroom. Each student gets to take their own path.
