Ada Christian School sets class size upper limits that are dependant on the grade level. Every attempt is made to keep classes sizes within the boundaries. If the need for larger classes is apparent, the Education Committee and School Board create a plan and resources to ensure that students receive the best education possible.

Under these guidelines, kindergarten and first grade classes are at less than or equal to 22 students per class. The numbers gradually increase to the eighth grade, where 28 students may be in the class. The average class size for the 2004-2005 school year is 21 students per class.