This growing set of resources — created by educators practicing Challenge Based Learning — are meant to be adapted to your particular need. Begin by downloading the CBL Classroom Guide.
This Multi-touch book can be downloaded from the iTunes iBookstore and viewed on an iOS device to view example CBL projects from Jane Ross's students in Indonesia.
This webpage from Nebraska Loves Our Public Schools provides a snapshot into CBL at O'Neill Public School, specifically in Elementary Physical Education classes.