This is a purely demonstration project after a few hours of hacking. I made a copy of the Khan Academy Exercise software and put it up on Google App Engine. I then modified it to accept IMS Basic LTI launches and auto-provision accounts and auto-connect Learners to Instructors as coaches. So the need to make an KA account and for each student to select a coach is completely eliminated. Based on the course roster in the LMS, all is automatic. Further, the accounts are fully name spaced by Consumer Key so information is nicely siloed for each course. I apologize the the roughness of this, I started yesterday and tried to see how far I could get. Thanks to the internal elegance of the Khan code and the fact that they had done some nice refactoring to support Facebook and IMS BLTI is similar to FaceBook, the modifications turned out to be pretty easy.

This should not be considered production but after a few days, I can give out keys to folks who want to do simple demos with this instance. In the long term, I would love to see Khan Academy support BLTI on their servers and merge a cleaned-up version of this code into their source tree.