This instructor's manual and reader's guide accompanies the second edition of <i>Structure and Interpretation of Computer Programs</i>, by Harold Abelson and Gerald Jay Sussman with Julie Sussman. It contains discussions of exercises and other material in the text as well as supplementary material, additional examples and exercises, and teaching suggestions. An appendix summarizes the Scheme programming language as used in the text, showing at what point in the text each element of Scheme is introduced.