Students' achievement task values, goal orientations, and interest are motivation-related constructs which concern students' purposes and reasons for doing achievement activities. The authors review the extant research on these constructs and describe and compare many of the most frequently used measures of these constructs. They also discuss their development during childhood and adolescence. They review the research on the relations of these constructs to achievement outcomes, and their relations to each other both contiguously and over time. Suggestions for future research include testing theoretically derived predictions about how students' achievement values, goal orientations, and interest together predict various achievement outcomes; and examining how their relations with one another become established and change over time. (Contains 1 table.)