In prior research and development, the project team and partners developed Cyberchase, a multimedia story-based series for students to practice and learn math. Researchers will develop and test a prototype of a mobile app-based fractions game to be integrated within the multimedia series. The prototype will adjust to students of different skill levels, and will present fractions in different representations (pictures, numbers, and words) to support different modes of learning. In the Phase I pilot, researchers will work with two grade 3 classrooms, and will examine whether the prototype functions as planned, if teachers are able to integrate the game into classroom practice, and whether the prototype shows promise for improving student learning of fractions.