Tech Tips and Resources for Teachers   
Modified - 03/23/2009 07:10am iMovie Directions & Screencast
Here are a series of steps to follow to help you create your iMovies:

iMovie Part 1 Getting Started
iMovie Part II Putting clips and pics into iMovie & Ken Burns' Effect
iMovie Part III Adding Music
iMovie Part IV Adding Titles
iMovie Part V: Video Effects
iMovie Part VI: Transitions
iMovie Part VII: Splicing and Fading Music
iMovie Part VIII: Saving and Sharing

Bare Bones iMovie '06 (PDF: Bare Bones Steps to Making an iMovie)