Production rules used to build a problem-solving system and a tutorial interface that controls interaction between user and system are described. The tutorial interface controls the rule- based problem solver used to emulate a student's steps, while the system provides a flexible framework for algebraic problem solving. (Author/MBR)

Describes study of university students that investigated the effects of two direct instruction techniques in a computer-based algebra lesson: the cognitive routine (CR) and the Corrective Feedback Paradigm (CFP). Research design is explained, results are analyzed, and further research is suggested. (nine references) (LRW)

This study investigated the effect of reward structure and group ability composition on small group computer-assisted instruction. Junior high school students practiced algebra in mixed-ability or uniform-ability groups, and rewards were based on individual performance, group performance, or a combination of both. (29 references) (Author/LRW)