There’s a lot to the site. It’s basically an extremely interactive way to learn about the news, but that’s an understatement. It’s designed for students thirteen years-old and above. You can play games, watch videos (which all have very easy and simultaneous access to its transcript at the same time — great for English Language Learners and, in my experience, unusual on the web), save student work, and a ton of other activities.
You have to register, but it’s free and easy to do so.
I’d suggest you take a tour of the site and read David’s post on it.
I’ll be placing the link on my website under News.