Creating a storyboard is an essential part of an film/video project. Here are some sites that can help you with the storyboarding process.

Wikipedia Entry–Storyboards
Digital Media Center–Storyboarding
Adobe Digital Kids Club–Storyboarding
Youth Learn–Using Storyboards

Here are some sample storyboards. You can make your own easily using word processing software. You can also use Inspiration or Kidspiration to storyboard.

PBS Kids Storyboard Template
Shoreline Schools Storyboard Template
HRW Storyboard Template
Bernajean Porter's Storyboard Template