c2263325_culty_Institute___What_is_PBL___WHY_
[WHAT:] Context-specific [HOW?] Choose real or contrived cases and ground the count in the kinds of challenges faced by practitioners in the field. [WHY?] 
Again, context-specific information tends to be learned at a deeper level and retained longer.
Problem-Based Learning Faculty Institute - What is PBL?
WHY?