Abstract
Problem-based learning (PBL) can be organized and conducted in a variety of forms. By adopting a Domain-Specific Modeling Language (DSML) approach we have developed a PBL scripting language, which provides natural concepts that teachers can understand and use in practical PBL. Based on this PBL scripting language, a web-based PBL authoring tool has been developed, which enables teachers to develop their own PBL strategies as PBL scripts.