Copyfitting is probably the least exciting portion of any course that deals with design and production of print advertising. Students find the transformation of manuscript copy into set type difficult to visualize. The math, though no more than multiplication and division, seems insurmountable to some--probably because the entities such as points, picas, units, and such are not familiar and what is happening to them not directly obvious. Even professionals forced to grapple with these manipulations find them less appealing than designing with markers and type. "Copyfitting Instructor" is a computer program written to alleviate some of the tedium. Its origins are in a program developed for professionals and designed to take over the calculator work. This instructional package also contains the original "Copyfitting Expert" as one of its modules so it can be retained for use after the instructional portions have fulfilled their function. That is, if a student never figures out how to do the math but succeeds in just learning the concepts, this program, which may be freely copied and retained, will solve whatever future copyfitting situation should arise. The program is written in four modular, self-sufficient packets, compiled from "Basic" with source code included for modification, improvement, or customization. The program has three levels of sophistication, permitting some flexibility in how the program is integrated into the usual drill on copyfitting. (Author/HTH)