KHAN ACADEMY: A free world-class education for anyone anywhere. Khan Academy is an organisation on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
The Khan Academy is a non-profit educational organization and a website with library of over videos covering everything from arithmetic to physics, finance, and history and hundreds of skills to practise. it's a wonderful resource for homeschool families.
Mastery Connect offers handy and free resources on the National Common Core State Standards.
An Interesting Infographic Featuring 20 of The Best YouTube Channels for Math Teachers (Educational Technology and Mobile Learning)