Before a student is allowed to film they must first complete the planning process of a treatment, script and a storyboard. Storyboard Pro is a great freeware software that helps students with the creation of their storyboards. This website contains a number of tutorials to help students get started with the software. This could be used in grades 6 and up.
Con: some schools may not allowed this to be downloaded and installed on student computers
This website includes a great introduction to the film making process. Its broken up in to easy to navigate sections such as scripting, storyboarding, etc. Can be used in classrooms anywhere between grades 6-12.
Cons: site contains advertisements.