This report documents the BASIC Instructional Program (BIP), a "hands-on laboratory" that teaches elementary programming in the BASIC language, as implemented in the MAINSAIL language, a machine-independent revision of SAIL which should facilitate implementation of BIP on other computing systems. Eight instructional modules which make up the BIP system are described in detail, including curriculum data structures and the information saved in student histories. These modules are called (1) ONOFF, (2) BIP, (3) PARSE, (4) XERS, (5) ERRDOK, (6) TEACHR, (7) VERFY, and (8) MSRECS. A list of techniques and skills within the techniques is appended. (Author/CMV)