Coding systems need to be developed to account for computer decisions on every frame of a self-instructional program. In flow charts of the UICSM high school math programed series, each frame or page is represented by a diagramatic convention: diamond if a mainline frame, a rectangle if a quiz frame, a bottom-heavy trapezoid if a review or remediation frame, or a top-heavy trapezoid if a skipping or by-passing frame. Frames are numbered, and some have reference numbers indicating structure originating from the page (branch, loop, or neither), location of the page within the general structure (within mainline or within remedial or enrichment loop or branch), number of paths originating on the page, and intended purpose of paths originating on the page. A four digit coding system is used. (BB)