Figure 5.5: Practice Page

This page displays an instance of the problem, followed by the Answer Editor. This is where a solution to the problem can be attempted (Fig. 5.5). All practice problems are generated by algorithms with random selection of parameters values so that the variety of problem instances for any item is very great.

Underneath the Answer Editor are buttons labeled "Next" and "Explain." Clicking on "Next" has the same effect as described for the Assessment Mode: it submits the answer. Here, however, the user finds out immediately whether the answer is right or wrong. If it was correct, a new problem is presented or (if the system believes this topic has been mastered) a choice of new items is offered. Wrong answers will return the presentation of the original problem (on the Wrong Answer page) with feedback on the student's error. Students can then click on "Explain."