Khan Academy on a Stick
Negative Exponent Intuition
Intuition on why a^-b = 1/(a^b) (and why a^0 =1)
If the above player doesn't work, you can try this direct link.
Intuition on why a^-b = 1/(a^b) (and why a^0 =1)
If the above player doesn't work, you can try this direct link.