Do you want to teach high school or elementary? That does make a difference. Elementary Education is a major unto itself in most states. I cannot speak directly about the Washington requirements. If you want to teach high school you need to have a subject area, like English or Science and major in that field with education, like English Ed. or math ed. Certification comes from the state Office of Public Instruction. In some states the degree is enough, you usually have to have specific classes and a few states may still require a test of some sort for certification. Talk to the admissions counselor at the college where you are thinking of attending and/or your high school counselor. They will help you get this straight.