Curriki is an online environment created to support the development and free distribution of world-class educational materials to anyone who needs them. Their name is a play on the combination of 'curriculum' and 'wiki' which is the technology they are using to make this site possible.
I found out about Curriki along with some other free sites through Open Source at the Educational Technology Leadership Conference I just attended in Roanoke, VA.
You can contribute your own materials. You can also build a whole collection of materials from resources you find. Members can bookmark resources they want to find again by clicking the Favorite link. You can also share individual resources with a friend by clicking "Email".
So become a member and explore this wonderful site available for teachers. Click the following link: