This project team will develop and test a prototype of LifeSim, intended to be a financial literacy game app for high school students to strengthen mathematical skills and practical life knowledge. In the game, high school students will manage hypothetical investment funds and be challenged to understand compounded interest and debt. The app will include materials for math teachers to integrate the game within instructional practice. At the end of Phase I in a pilot study with 50 students, the researchers will examine whether the prototype functions as planned and if students are engaged during gameplay.