In addition to the evaluation procedures for determining whether students are eligible for special education services, school districts must follow additional procedures for identifying whether a student has a specific learning disability. Each school district shall develop procedures for the identification of students with specific learning disabilities which may include the use of:

(1) A severe discrepancy between intellectual ability and achievement; or

(2) A process based on the student's response to scientific, research-based intervention; or

(3) A combination of both within a school district, provided that the evaluation process used is the same for all students within the selected grades or buildings within the school district and is in accordance with district procedures.