Sticky note tool that has some very nice organization and collaboration tools. Well worth a look.
Over the years we have seen little time or funding devoted to professional development (PD) that might equip teachers with the skills required to make smart and productive use of new technologies. What little PD we have seen was devoted mainly to the learning of software and how to operate the latest toys. We have too often placed carts before horses.
Collaborator needs an account.
Mind Mapping Collaboration
White Board Collaboration
White Board Collaboration
Your 3 -ring binder on the web. Very cool way to organize your info for the web. Would be interested to see how your teachers use it.