This link directs you to the Libraries Linking Idaho database, that has a ton of resources on many topics. Databases are huge collections of information to help students learn and research.
I have used the Learning Express Application, located in "Featured Resources" on the main page, the most. It has resources on the PSAT test (Sophomores), the SAT test (Juniors & Seniors), and the ACT test (Juniors & Seniors). However, there is even more information on careers, colleges, etc.
If you are looking for some test help, skills building, or where to start you college hunt this is a great starting point!