Science has its own rules for what makes good writing and this page from the Writing Center at University of North Carolina has some great tips on how to write effectively in science
While commanding the ISS, Hadfield used social media like Twitter and YouTube to get people excited about space and, in this interview, shares why he thinks it was so effective
The edtech 541 textbook mentions CIESE collaborative projects, but they also have some neat options where students work with real-time data, mostly focused on earth science topics
An interesting article on creating YouTube-based units. While the article focuses on how this could work in a science classroom, it seems like it could be adapted to other content areas, as well.
I recently heard an interview with acoustic engineer Trevor Cox and discovered his YouTube channel as a result. He's got some amazing videos related to sound that could be a great hypermedia tool for a science classroom.
A collection of spreadsheet simulations that allow students to play with values to see what happens in order to illustrate a variety of physics concepts