Students learn in a number of ways and in a variety of settings, They learn
through lectures, in informal study groups, or alone at their desks or in
front of a computer terminal, Wherever the location, students learn most
efficiently by solving problems, with frequent feedback from an
instructor, following a worked-out problem as a model, Worked-out problems
have a number of positive aspects. They can capture the essence of a
key concept — often better than paragraphs of explanation, They provide
methods for acquiring new knowledge and for evaluating its use, They
provide a taste of real-life issues and demonstrate techniques for solving
real problems, Most important, they encourage active participation in
learning.