Variety of historical information, broken down by topic, can be found in this blog. Most topics discuss controversies, have images/documents and fun facts.
This blog has a little bit of everything! It gives creative teaching tips as well as fun educational resources and activities to do in your classroom. I love the organization ideas as well.
This is a great place to see what concerns the youth of today. This will give teachers ideas on what hot topics are out there (especially for classes that have debates).
This is a past k-12 music teacher who voices her opinions on the controversies in eductation as well as the positives. I loved reading her blog. It gave me a new perspective on some things that I really didn't think about before!
Definitely one of my favorite academics out there. He delivered the now famous TED Talk "Do Schools Kill Creativity?". Some great information on here, including thought-provoking discussion and plenty of paradigm-challenging discourse.