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you need at least four years of college to become a elementary teacher   and if you want to become a junior high teacher or a high school teacher   you need eight â¦ years of college or a higher degree in education.
To become a science teacher, youâll need to. complete a Bachelorâs Degree in science teacher. education.This will take about four years.You will. study subjects such as biology, chemistry, earth &. space science, environmental science, and physics. as well as mathematics.Youâll take courses in.