The authors use Canadian data from the Third International Mathematics and Science Study to examine six instructional methods that mathematics teachers use to introduce new topics in mathematics on performance of eighth-grade students in six mathematical areas (mathematics as a whole, algebra, data analysis, fraction, geometry, and measurement).…

An example is provided of an evaluation in which the formulation of explicit decision rules was a central activity. The case for and against the use of decision rules in program evaluation is considered, and the appropriate context identified. Implications for the rights of decision makers are addressed. (Author/CTM)