webdoc, which is currently in beta, is a possible replacement/competitor to Glogster...although it does not have an education based theme or offering. The concept is similar and provides many of the same options, just in a different format. One aspect that is different is that users have the ability to reply to a webdoc by creating their own webdoc about the topic. One feature is a "This or That" where users can discuss and interact between two things, or provide their own "This or That" argument. It has the feel of a Point-Counterpoint type theme.
Users can put almost anything into a webdoc: pictures, videos and music from all over the web, but also interactive applications like games, polls, slideshows or web services such as Google Maps and Twitter. Anyone can start a conversation naturally with just one friend or all of them, and users can both friend people and follow conversations.
webdoc in action from webdoc on Vimeo.
The webdocs can be published publicly or privately which is a good option to have for educators. However, I am still uncertain as to using it in the classroom because of several in the gallery that I don't think are appropriate. I could really see it being used as a method of discussion or a great way to incorporate debate topics into the classroom. Students could easily post links, pictures, videos, etc for the purpose of debating them. webdoc is an interesting concept, but needs a more education based option to be completely adaptable in the classroom.
Here is a fun sample: Which 90's Dude Duo Was Cooler??