A framework for sharing problems and evaluation case-bases in instructor communities

It is very important to develop technologies that automatically evaluate learners' answers for descriptive problems such as programming practice, in the e-learning environment. The case-based approach is one of the most promising technologies for automated evaluation. The key issue in implementing automated evaluation systems by the case-based approach is how one can acquire many evaluation cases and construct rich case-bases. This paper presents a solution to the issue, that is, a framework for sharing evaluation case-bases among instructors. Sharing case-bases promotes enrichment of the case-bases, because case-based evaluation systems obtain new cases through evaluation work, which is the collaboration between human instructors and computer systems. The framework for sharing case-bases is also expected to form the instructors' community and promote communication among instructors.