In Limestone County, the county board of education, upon recommendation of the county superintendent of education, may substitute other books or texts for use in the county schools under its jurisdiction for the textbooks on the list of state-approved or state-adopted textbooks prescribed by the State Board of Education. Whenever books or texts are substituted for the state-approved or state-adopted textbooks, the books or texts shall be used by the teachers in the county school system in teaching any course or courses for which a substitution has been made. The textbook shall be paid for with state funds in the same manner as textbooks are paid for in other local school systems which have substituted textbooks for local use.