If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Wed, 22 Aug 2012 15:16:05
Intern Dylan Vassallo has been working this summer to convert our Google App Engine datastore to use the next-generation “NDB” Python API.
Read more about Dylan’s experience in converting our system to use NDB. And if you’re considering upgrading your App Engine to use NDB, don’t miss A Hitchhiker’s Guide to Upgrading App Engine models to NDB.