Pretend you are back in middle or high school. You are able to choose any topic to study, but it has to be either a big idea or an authentic challenge.
What would you choose to study and why? Feel free to use this PBL template to get your ideas flowing:
How can we, as _____ (role), ________ (do, create, design, build, etc.) for/to ________ (purpose)?
For more information, take a look at Project Based Learning: Design and Coaching Guide: Expert Tools for Innovation and Inquiry for K-12 Educators by Thom Markham.