Useful Links to help with problem based learning.
Guidelines for problem based learning
Case studies in problem based learning from Geography, Earth and Environmental sciences
Economics Network: Reflections from a student on using Joshua Farley's Ecological Economics: A Workbook for Problem-Based Learning
Handbook for economics lectures (including key features of PBL)
Study guides and strategies to problem based learning
This first video gives some good ideas about organising group meetings and what should be discussed.
Students' experiences in problem-based learning
Environmental Learning Using a Problem-Based Approach in the Field: A Case Study of a Hong Kong School