The purpose of this study was to determine whether there are different growth trajectories of arithmetic strategies and whether these trajectories result in different achievement outcomes. Longitudinal data were collected on 240 students who began the study as 2nd graders. In the 1st year of the study, the 2nd-grade students were assessed on…

Four experiments involving 101 first and third graders investigated developmental changes in children's knowledge about the types of strategies that are appropriate for achieving goals of comprehension or memorization. Only third graders distinguished between comprehension and memory by consistently selecting the appropriate strategy. (SLD)

Differences in component processing skills of students of different ages and developmental changes over 1 year were studied for 96 students in grades 2 through 4 and 59 of them in a follow-up. Results trace the development of component processing skills and suggest a theory of the development of component skills. (SLD)

Confirmatory factor analysis of data from a portion of a long-term study provided evidence for two components of math anxiety for 298 male and 266 female 6th through 12th graders. The components related to negative affective reactions and cognitive aspects. Age and gender differences were significant. (TJH)

Six experiments with 42 kindergartners, 190 first graders, and 15 second graders in Germany investigated why arithmetic word problems with an unknown reference set are more difficult for children than are problems with an unknown compare set. Lack of access to flexible language use makes these problems so difficult. (SLD)