Experimenting with Model Solutions as a Support Mechanism

We describe an experiment from an introductory programming course where we provided students an opportunity to access model solutions of programming assignments they have not yet completed. Access to model solutions was controlled with coins, which students collected by completing programming assignments. The quantity of coins was limited so that students could buy solutions to at most one tenth of the course assignments. When compared to the traditional approach where access to model solutions is limited to only after the assignment is completed or the assignment deadline has passed, students seemed to enjoy the opportunity more and collecting coins motivated some students to complete more assignments. Collected coins were mostly used close to deadlines and on more difficult assignments. Overall, the use of coins and model solutions may be a viable option to providing students additional support. Data from the use of coins and model solutions could also be used to identify students who could benefit from additional guidance.