I write in my book, English Language Learners: Teaching Strategies That Work, about how I used problem-based learning in the classroom. It’s very engaging, and very effective on a number of levels.
Apparently, the Central Intelligence Agency (CIA) agrees.
I think they’re pretty good, and being able to attribute them to the CIA will only make them more attractive to students. I can see giving students the lists and having them pick the ones that they’re most interested in answering.
I’ll eventually make a separate “The Best…” list for Problem-Based Learning but, for now, I’ll add this resource to The Best Sites For Cooperative Learning Ideas.