Are your teachers new to PBL?
Start with Level 1 courses:  “Brainstorming projects” and the “PBL Certification” . 

Do you have a staff with mixed experience in PBL?
Start with the “PBL Certification course” and then move on to Level 2 and 3 courses 

Have your teachers been implementing PBL and looking to improve their projects?
Jump in to level 2 or 3 courses, BUT we have also received feedback that Level 1 courses were a great calibration exercise for ALL staff members to complete.