lexibility
Teachers can gain certifications to teach multiple grade levels, from kindergarten to high school. They can specialize in different subjects in the upper grade levels, such as math, technology, geography and foreign language. The more certifications a teacher obtains, the more flexibility he has to change grade levels and offer a positive impact to a wider range of students. In addition, as long as the teacher remains in the same state as he received his certification, he can apply for jobs at other schools throughout the state. If he chooses to leave the state, he may have to take the new state's teacher certification test to become eligible for a teaching job.