Students have TI-92s which they use to take data or plug into the CCS network. As he pauses to ask a question one can hear a pin drop in the lecture hall. She uses a CCS to have students input their interpretations of a reading exercise. She shows them the histogram on a TV screen and holds a class discussion about the different answers. On other days they answer puzzles.
Students get so involved they barely realize that they're reading the puzzles.
The environment becomes more lively and active. Students report that they understand the subject better which is confirmed by quantitative studies. They work harder in class, but enjoy it more. There is also evidence that they do more work out of class. Teachers become more aware of student problems with the subject matter.