How many years do you have to go school for a sign language teacher?

The educational requirements to become a sign language teacher vary depending on the level of education you wish to teach and the specific state or country. There's no single answer.

Generally, you'll need at least a bachelor's degree, but many positions prefer or require a master's degree, especially for teaching at the secondary or post-secondary level. Within those degrees, you'll need coursework focused on education, sign language (ASL or other relevant language), and potentially deaf studies. Furthermore, teacher certification or licensure is typically required, adding to the overall time commitment. This could mean additional coursework or a separate certification program. In total, it could take anywhere from 4 to 7 years or more to complete all the necessary education and licensing.