Curriculum websites

I came across these websites and thought they might be useful.
I hope you enjoy

http://welcome.curriki.org/
Quote from their website:
What happens when classroom teachers from every country in the world take part in a global community of sharing curriculum and best practices? Teachers are empowered to create extraordinary learning experiences for their students. Barriers to equal access to education begin to lift – geography and politics become immaterial. And the economy benefits from a highly education population. That’s why we founded Curriki, a non-profit K-12 global community for teachers, students, and parents to create, share and find free learning resources that enable true personalized learning.

http://www.educationworld.com/
Quote from their website:

In 1996, the founders of EducationWorld recognized the need to create a home for educators on the Internet, a place where teachers could gather and share ideas. They wanted to create a complete online resource that educators could visit each day to find high-quality lesson plans and research materials.

The result is EducationWorld.com, a resource that includes
original content, including lesson plans, practical information for educators, information on how to integrate technology in the classroom, and articles written by education experts;
Web site reviews;
special features and columns; and
employment listings.

Edit* Just found another site.
http://www.instagrok.com/