From the abstract: "Response to Intervention (RTI) or Multi-Tiered Systems of Support (MTSS) is beginning to be implemented in preschool programs to improve outcomes and to reduce the need for special education services. The proportions of children in programs identified as struggling learners through universal screening have important implications for the feasibility of these approaches as well as for the way programs might allocate resources and staff implementing tiered models of intervention. The expected proportions of children who might be identified for higher tiers of instructional support in pre-kindergarten settings are relatively unknown. The proportions of children who would have been identified for higher tiers of instructional language/literacy support when using three different universal screening measures are described. Participants were 659 children participating in the Center for Response to Intervention in Early Childhood (CRTIEC) Tier 1 Study. Results indicated that the proportions of children at Tier 2 and Tier 3 performance levels were higher for children in low-income eligibility programs and varied by program-level characteristics including numbers of English language learners and children with special needs, as well as the universal screening measure used. Implications of these findings suggest the importance of increased focus on early literacy and language in Tier 1 instruction in programs serving high proportions of children at risk as a means of preventing reading failure in future years." Citation: Carta, J. J., Greenwood, C. R., Atwater, J., McConnell, S. R., Goldstein, H., & Kaminski, R. A. (2014). Identifying preschool children for higher tiers of language and early literacy instruction within a response to intervention framework. Journal of Early Intervention, 36(4), 281-291.The research study is available online: <https://www.researchgate.net/publication/275243333_Identifying_Preschool_Children_for_Higher_Tiers_of_Language_and_Early_Literacy_Instruction_Within_a_Response_to_Intervention_Framework>.

From the abstract: "Preschool experience plays a role in children's development. However, for programs with language and early literacy goals, the question remains whether or not preschool instructional experiences are sufficiently effective to achieve these goals for all children. In a multisite study, we conducted a process-product description of preschool instruction and children's growth and outcomes in typical programs (i.e., Pre-Kindergarten, Title 1, Head Start, Tuition-Based) using a Response to Intervention (RTI) perspective. Results indicated that (a) students in their preschool year prior to kindergarten made small gains, but students starting the year in lower Tier 2 and 3 performance levels did not close initial skills gaps, (b) variations were noted by program types with varying socio-demographics and instructional processes, and (c) the quality of instruction (Tier 1) received by all was low with room for improvement. Implications for future research on the application of the RTI approach and potential benefits are discussed."Citation: Greenwood, C. R., Carta, J. J., Atwater, J., Goldstein, H., Kaminski, R., & McConnell, S. R. (2012). Is a Response to Intervention (RTI) approach to preschool language and early literacy instruction needed? Topics in Early Childhood Special Education, 33, 48-64.The research study is available online: <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4041200/>.