Some ideas for lessons on teaching computers. Most are as an end-user rather than a developer or creator.
Shrinking Candles, Running Water, Folding Boxes
This activity allows students to look for functions within a given set of data. After analyzing the data, the student should be able to determine a type of function that represents the data.
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LOTS of good material here.
Up-to-date list of lessons for K-12 teachers using the Internet.
The lesson plans demonstrate how laptop computers can be used to engage students in hands-on learning of science and mathematics. The lessons are useful for teachers planning a science or math activity, for pre-service preparation, and for in-service professional development.