Exponents are usually first introduced in math class in the fifth grade. However, the level of difficulty of the concepts taught varies depending on the grade. In general, the lower the grade, the more basic the concepts will be. For example, in fifth grade, students may learn about square roots and cube roots, which are both examples of exponents. However, they will likely not be taught about negative exponents or fractional exponents. These more advanced concepts are usually reserved for higher grades, such as seventh or eighth grade, even high school and college.