This research describes the development of measures of student motivation. Using the expectancy-value model of motivation as a theoretical rationale, instruments were developed to measure self-efficacy and attitudes toward the importance of learning in general, science, mathematics, and reading/English of elementary, middle, and secondary students. The instruments were validated with existing measures and teacher ratings of students. Results of die multitrait-multimethod analyses indicated acceptable construct-related evidence for validity. Stability estimates of reliability fanged from .56 to .88 for the elementary school form, .67 to .89 for the middle school form, and .69 to .88 for the high school form. Conclusions and recommendations for further development are indicated.