The best way to get in touch with your instructor is by email. You can email your questions and ask about homework or quizzes that you're stuck on. Or, if you are close by, you can visit your instructor during their office hours or make an appointment to meet in person.
Drop-in math help is available at the Learning Centers at all four locations; Albany, Corvallis, Lebanon and Sweet Home. Instructional assistants will spend up to five minutes at a time with you to explain homework problems or concepts. There is also an open study area nearby so that when a question comes up, math help is close by.
As a student, you are eligible for free tutoring a few hours each week. Tutoring must be scheduled in advance, so check into this option early in the term. Contact the Learning Center or Math Lab for more information.
Depending on the class you're taking, your book may have online tutorials or videos that go along with each section. Check with your instructor for more information.