Welcome giftedmiddle! We are mostly parents at this site, but here are a few links that might help you.

Byrdseed is a great blog full of lesson ideas for working with gifted kids, including several on differentiation:
Byrdseed lesson ideas

The Davidson Institute has a great resource -- the Educators Guild. You can sign up to be on an e-list with other GT teachers. There are also a lot of resources there: Davidson Institute Educators Guild

There are a few other teachers that frequent this forum, and you're welcome to stay here too. smile