The final feature we want to add in the next release is the ability to track users and their behavior. In many settings the ability to categorize and track mistakes allows a more sophisticated user interface. We foresee the student/team signing on and a history file being maintained which details what the students tried in order to debug a circuit and how long it took them to develop a working circuit. Based on the history and instructor preference, VCL would provide the student/team with similar or more difficult debugging scenarios as the term progressed. The history mechanism would allow us to proactively reach our goal of developing students with good debugging skills. While we have ambitious goals for the VCL project, we feel that we have the base for such development in the current release. This beta release can be found at