The CLASS Interactive Lesson is a high powered multimedia tutorial that provides an electronic teaching and learning tool, unparalled in its speed, unmediacy, and impact. Like the rest of the CLASS components the Interactive Lesson is organized by body region. Over 400 high resolution colour photos and line drawings from the textbook and atlas are presented on-screen, along with brief text and multiple choice questions. Working through these question and answer sets enables students to readily spot - and shore up gaps in their knowledge. Advanced computer animation techniques are employed to accurately illustrate how processes such as descent of the testes or rotation of the gut actually unfold. The result: A powerful software tutorial that students can use at their own pace - receiving instant feedback and valuable explanations every step of the way. The tutorial is structured as follows: The program comprises lessons derived from "Socratic" questions (between 7 and 12 lessons per region); Each lesson includes 2 to 6 "cards" addressing this lesson; Each card then includes between 1 and 5 multiple choice questions relating to the image and text on screen; Pop-up boxes explain why the student"s answer is right or wrong; "See Labelled Picture" prompt brings image with complete list of structures. FEATURES: "Roadtested" for several years in medical schools; Flexible, self-paced learning; Over 400 high-resolution colour illustrations.