Describes a research study in which students were observed in eight secondary school mathematics classes and time lost from instructional activities was assessed using a time-filter. A typical child was assessed as spending slightly more than half the allocated time to time on task. Stability of results is discussed. (EAO)

The effectiveness of multiple matrix sampling was examined in a study of 495 students' attitudes toward a computer education program. A post hoc analysis of variance was used, with the class as the unit of analysis. The Computer Attitude Scale, a 30-item rating scale, was used to measure attitudes toward learning about and working with computers.…