Thanks to East High for these video links. They are aligned directly to sections in your textbook. If you need to reteach yourself a section, or you missed material due to absences, this is a great resource.
PreCal Semester 1 – Trigonometry Videos
PreCal Semester 2 – College Algebra Videos
Khan Academy also has videos on almost any math topic. They do a good job of explaining procedures, but are not always good at explaining underlying concepts and connections.