Discusses a mathematical model for mastery learning. The model includes measures of a motivational factor and the specific ability of a learner with respect to content being learned. The model also contains a variable reflecting prior learning. Assumptions/limitations are discussed, and research questions raised. (Author/JN)

Instrumentation, methodology, and analysis techniques were developed to measure changes in adolescents' (N=10) skills in linear distance estimation. Microcomputers were used to present and control amount of information available to assist students in said estimations. Results and implications are reported. (Author/SK)

Describes and evaluates science teachers' implementation of microcomputers at a field-test site that was part of a program to encourage literacy of science teachers in the use of microcomputers (ENLIST-Micros). Discusses why only 33 percent of the teachers used computers one year after the training. (Author/YP)