Graphing exponential functions: http://www.youtube.com/watch?v=WASZCorhxsQ
Solving exponential equations: http://www.youtube.com/watch?v=t5THS9qUh-I
Logarithmic equations: http://www.youtube.com/watch?v=KHKDOja_YKk
Solving logarithmic equations: http://www.youtube.com/watch?v=2tBVOm8geuI
Properties of logarithms: http://www.youtube.com/watch?v=9vCZ2T5mMfM
Properties of logarithms: http://www.youtube.com/watch?v=vodEzll6SI8
Common logarithms: http://www.youtube.com/watch?v=oIrUWrefyLk
Natural logarithms: http://www.youtube.com/watch?v=5Z4MholtB5E
Graphs of exponential functions: http://www.youtube.com/watch?v=2zzjNxOGgCM
Graphs of logarithms: http://www.youtube.com/watch?v=BSywY3BxRfI