This study examined the relationships between teachers' instruction of task value, task value evaluation, and learning behavior. A self-report questionnaire survey was administered to 256 junior high school students regarding the lectures they attended in science classes. This study examined five types of task values (interest value, attainment value, two utility values (one for practice and the other for entrance examination), and cost), three types of teachers' instructions of task value (teachers' instruction of interest value and teachers' instruction of utility value, for both practice and entrance examinations), and three types of learning behavior (persistence in learning, behavioral engagement, and pursuance of interests). Results indicated that (1) teachers' instruction of task value promoted task value evaluation (specifically, teachers' instruction of utility value for practice promoted interest value, attainment value, and utility value for practice) and (2) each task value promoted learning behaviors in various ways. The implications of teachers' instruction of task value on the junior high school students' learning in the light of the present findings were discussed.
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