If you do not already have a bachelor's degree, you may be able to earn your degree and your teaching certificate at the same time. Earning a certificate through a degree program is sometimes called the "traditional" route.
"Traditional" certification or licensure (the terms vary by region, but they both mean you've been qualified to teach) programs usually refer to someone who graduated from college with a degree and coursework centered around education. This is the most common path, with 80% of teachers taking the traditional pathway, according to the National Council on Teacher Quality (1).
Many colleges and universities offer a teacher prep program that goes along with a degree in education or a teaching subject, like math, history or art. So you might major in English or biology, minor in education and earn your teaching certificate all at the same time.