If you need a full course on almost any subject there is one at http://www.hippocampus.org/Which might be useful for finding a lesson, when you just cannot
How to use Vernier Software First here is the link to the free version. Second, we have a fully licensed version at the school, so see me about getting it installed on your computer, as the license is a site license intended for you the student to have a copy to work with. (Under Construction some links to videos of setting things up and using).