As the title says, short and sweet: What are your favorite blogs for 21st century teaching, by subject matter? 

As a classroom teacher myself with a 3/4 teaching load plus unofficial tech coordinator duties for k-12 at my school, I don’t have much time this year to stay abreast of all the great teacher bloggers out there. I think this thread can be useful for others like me, for teachers looking for others in their subject area, and for professional development types looking for models to share in their workshops.

So real simple, again: At a minimum, list the blog name, blog address, teacher name, and content area, and age group they teach (primary, middle, secondary is fine).

I have a project in mind that will use your recommendations to, I hope, move things forward.

And if you’re a teacher yourself, don’t be shy: list yourself