This paper describes an investigation of problem sequencing as part of a symposium presenting theoretical concerns and research findings regarding several diverse types of strategies for designing and presenting instructional materials. The first step involved analyzing a set of problems, to determine the knowledge (rules) required for solving the problems. A set of geometric construction problems was analyzed using a method for deriving and simplifying rules or algorithms for solving the problems. Next, assumptions were adopted concerning how subjects learn and apply rules to solve problems. A computer was programmed according to these assumptions, and given some of the simplified rules identified during the previous step, in order to simulate some aspects of subjects' problem-solving and learning. Various problem sequences were then given to the program, to identify those that were solvable and "learnable." Finally, for initial evaluation of the approach, sequences that were learnable for the program were given to subjects, whose performance was compared with the performance of subjects given random or learner-controlled sequences. (Author/MLF)