This study investigated changes in elementary school students' (n = 140) situational interest as a function of achievement goal orientation profiles and task characteristics. The authors repeatedly measured situational interest during a simulated science learning task in 2 task conditions that differed in the concreteness of the task elements. The authors identified 3 groups of students with different goal orientation profiles: success-, mastery-, and avoidance-oriented. Results of repeated-measures analysis of covariance showed that students with different profiles displayed different patterns of changes in situational interest in the 2 task conditions. The results confirmed the importance of acknowledging the interaction of student and task characteristics in the arousal and maintenance of situational interest across a learning task.