PBL is designed based on the constructivist educational theories of Vygotsky, Dewey and others. PBL/CBL are student-centered instructional strategy which students work collaboratively to solve simulated problems of the real world.
General characteristics of PBL/CBL are:
- Learning is driven by challenging, open-ended, ill-defined and ill-structured problems.
- Students generally work in collaborative groups.
- Teachers take on the role as "facilitators" of learning.
In PBL, students are encouraged to take responsibility for their group, organize and direct the learning process with support from a tutor or instructor.
Adapted from: http://en.wikipedia.org/wiki/Problem-based_learning