I wish so bad that I could just show you in real life. It's a little difficult to explain the stuff in type.
Put your front foot in the middle of the deck. Put the back foot on the very end of the board. Push down with the back foot, while sliding the front foot up the board. This should should pull the back of the board up. Make sure that you bend your knees enough so that you'll have a lot of spring and will get high.
Hope that helps some.