Note: The story has been updated to include news of the launch, which occurred a day earlier than had been announced. Free online tutorial service Khan Academy has launched a new series of ...

The stellar Khan Academy offers free, well-structured online courses in a variety of subjects that you'll find in US schools, and serves as a reliable source for anyone with a hunger to learn. Where ...

“Math missions” are the latest in Khan Academy’s student-driven features. Khan Academy founder Sal Khan on Saturday during the CUE conference announced the launch of the organization's Common ...