Epplets: A Tool for Solving Parsons Puzzles

Performance on Parsons puzzles has been found to correlate with that on code-writing exercises. Parsons puzzles are preferred by students over alternative programming tasks. In order to make Parsons puzzles widely available to students in the introductory programming course, we developed a tool that administers the puzzles in C++, Java and C, called epplets. Our design of the tool improves upon the work done by earlier researchers in several ways: students rearrange lines of code rather than program fragments; they get credit based on the number of actions they take to reassemble the code; they get feedback that helps them fix their incorrect answer; and the tool adapts to the needs of the student. The tool runs as a Java Web application. We describe our experience using the tool for two years: how it benefited the students; the revisions made to address the feedback provided by the users; and our plans for future work. We found that practicing with the tool helped reduce the time and actions with which students solved successive puzzles.