Well i've never heard of Vi Hart but she seems to do a similar sort of thing to ...

TamDenholm on Jan 4, 2012 | parent | context | favorite | on: Vi Hart and Khan Academy Join Forces [video]

Well i've never heard of Vi Hart but she seems to do a similar sort of thing to Sal making educational videos, so it seems like a natural partnership. The Khan Academy seems to be going from strength to strength. :)