Kovaleski, VanDerHeyden and Shapiro (2013) used these IDEA regulations to operationalize how evaluation teams could utilize data collected during the provision of a multi-tier system of support in the evaluation process, particularly those data that inform the second SLD criterion of the child's failure to make sufficient progress in response scientific, research-based intervention (namely, RTI). Although evaluation teams may collect additional data after parents give permission for a full and individual evaluation, there should be ample data collected during three tiers of core instruction and robust intervention that can be analyzed to address all four of the SLD criteria.