From OLDaily ...

Matthew Williams has set up KQED Do Now an activity for students to engage with current issues using Twitter:

"Each week we focus on a specific area - civics, government and policy, science and art, and cover a story based on that topic. We provide a brief introduction to the topic, embed a media resources, and ask a question for students to discuss...

This is a great way to do what is in effect a JAM-of-Tweets.