Stanford Online, FREE Classes

Sometimes there ARE things in life that are free!  Stanford Online offers valuable classes for educators for FREE!  Yes, I'll say it one more time... free.  I just signed up for two classes starting in March:
1)  Mastering Language for the Common Core (Elementary Mathematics)
2)  Designing for Deeper Learning:  How to Develop Performance Tasks for the Common Core
If you sign up, let me know so we can compare notes.  There's always so much to learn!