A superb 'Must Try' HTML based collaborative whiteboard site. The tools are wonderfully simple. No log in required. Just share the page link to work collaboratively. Combine with a tool like Skype to share a lesson across classes, schools or even countries.
http://ictmagic.wikispaces.com/ICT+%26+Web+Tools
A great site where teachers upload drawing and paintings of animals and stories that go with it. Basic account is free, but a paid for option with more features is available.
http://ictmagic.wikispaces.com/Cross+Curricular
Y5/6 Teacher on Mersea Island, Colchester - Sharing ICT & other School resources on twitter & my websites http://ictmagic.wikispaces.com. Twitter @ICTmagic