Most mathematics assignments consist of a group of problems requiring the same strategy. For example, a lesson on the quadratic formula is typically followed by a block of problems requiring students to use the quadratic formula, which means that students know the appropriate strategy before they read each problem. In an alternative approach,…

Developmental differences in the acquisition of information about strategy efficiency gleaned from observation of a peer model were assessed among 60 second and 60 seventh graders and 60 undergraduate students. At each age level, 20 subjects were randomly assigned to each of 3 experimental conditions. Developmental differences were considerable.…