There are at least four main reasons for implementing RTI: 1) to increase achievement for all students; 2) to reduce racial/ethnic disproportionate representation of minority students in special education; 3) to increase collaboration and integration of general and special education; 4) and to identify students with learning disabilities through a different lens than the IQ-achievement discrepancy model. RTI proponents claim that when interventions work, fewer children, particularly minority children, are referred for special education, and that the RTI model acts as a safeguard, ensuring that a child is not given a label of a disability inappropriately. In addition, proponents state that RTI helps school districts by eliminating unnecessary referrals, which drain time and resources. Critics express concern, however, that in attempting to eliminate unnecessary referrals, RTI may also delay or eliminate necessary referrals.