Here are a list of different topics that you need to look into. Some of these links go directly to tutorials that I've viewed and like. Others are to a list of videos that others have created.
Multiplying with Scientific Notation or Multiplying with Scientific Notation
Scientific Notation with Powers
Searches, pick one from the list, hopefully you get a good one
Applications of Scientific Notation
Hopefully by 2014 I will have updated this with my own videos.
In the Questions section at the end leave links for different tutorials that you use and find good or bad to help others find good lessons and to help me know what types of things I need to cover.
I will add a quiz later as well.