Audacity
Here is a printable handout for Recording in Audacity.
Here is another version, or Recording in Audacity if you'd prefer a different look.
Yes, its the same information, but here is a Super Simplified Version.
Here is a printable handout (you may want to edit) to help your students turn in their project.
Here is a video tutorial - it is 13 minutes long but teachers should ABSOLUTELY watch before using Audacity in the classroom for the first time.