Start him off with some stretches with the boots on. Go over the bindings and stuff pretty clearly. Get him to put on one ski, and push himself in a circle, then do the same for the opposite ski. Get both skis on, and just have him skate/push around, to get used to the feeling of sliding. Then, take him to the base of the bunny hill, and depending on the snow conditions/angle of hill, teach him to sidestep/herringbone up the hill 10-30 feet. Have him slide down, and glide to a stop. Repeat the same thing several times, then introduce the snowplow. Once he can stop, get him on the magic carpet (lift if your hill doesn't have one), and start working on getting down the hill. Start to introduce parallel turns once he is comfortable getting down the hill. There are some good exercises on youtube for going from a snowplow to a parallel turn. Good Luck!