Not really a 'Psychology' site but it does have forums for Psychology where students can interact with each other. The revision methods are great too, I encourage my students to sign up for a free account in class and we spend time turning text into other revision methods.

I forgot to add the tag to this site and I don't know how to edit it to add it, without deleting the whole thing and restarting! Sorry :(

Lots of interactive resources and studies students can take part in - makes the DP course more 'true to life', especially in the 1st year

Lots of great resources that can easily be adapted for the DP course