case 1

Sine Period Bar Applet, Clip 1, 1:37

In this clip the teacher uses the applet to discuss period.

Sine Period Bar Applet, Clip 2, 1:52

In this clip the teacher moves the period bar around on the applet to generate a discussion.

Sine Period Bar Applet, Clip 3, 1:32

In this clip the teacher is using the period bar to compare outputs.

Sine Period Bar Applet , Clip 4, Recap, 1:48

In this clip the teacher leads a discussion tying the period bar applet to the unit circle.

Sine Period Bar Applet, Clip 1, 1:37

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  • The teacher starts the discussion by having the students recall the meaning of period.
  • Then, since he has the applet up, he is able to point to a place where the function repeats itself and ask why it is NOT the period. It is important that students be presented with counterexamples to help their understanding.