How to Design Programs (HtDP) is a textbook by Matthias Felleisen, Robert Bruce Findler, Matthew Flatt and Shriram Krishnamurthi on the systematic design of computer programs published in 2001 by MIT Press. The book introduces the concept of a design recipe, a six-step process for creating programs from the problem statement. While the book was originally used in conjunction with the TeachScheme! project (now ProgramByDesign), it has been adopted at a number of colleges and universities for the teaching of program design principles.