Games & Simulations

Rosie’s Rates


Rosie’s Rates is a game that takes players through the initial steps of slope derivation given a table of x and y values. The goal of the game is to help Rosie the Robot exchange currency for her customers by first finding the change in y and change in x, and eventually completing the equation y = mx. Players are challenged to be as speedy as possible or face unhappy alien customers. Each level brings a new customer with a new table of numbers, and each new planet brings players one step closer to completing the equation. Players help build Rosie’s storefront when they complete each level successfully. Additionally, players may earn bonuses at each planet.

The research reported here was supported by the Institute of Education Sciences, U.S. Department of Education, through Grant R305C080015 to the National Center for Research on Evaluation, Standards, and Student Testing (CRESST).