The second course is all about PBL which isn’t new at all. Since I’ve been around quite awhile, I can attest to the fact that it has cycled through at least twice. It is usually attached to inquiry. I have watched a bunch of videos and read a lot of articles to create a lesson for my students  (not done yet), but I find this video from Edutopia to be one of the best. The explanation of why PBL didn’t “stick” before is right on.