Try the blogs listed at Teach.com, Teach Make A Difference, in their ranking of teaching blogs.
I’m fascinated at the great teacher resource blogs I don’t see listed; one of the criteria for listing is that at least 50% of the posts must deal with education.
Consequently, it tends to be pedantically-oriented towards classroom technique, with a great diminution of education management and especially policy and politics, which are greater problems in education today, for my money (and lack of money, too).
You will find a lot of useful stuff there.
Was I right? Lots of useful stuff?