Original Research/StudyUsing Environmental Modification and Teacher Mediation to Increase Literacy Behaviors in Inclusive Preschool SettingsDeris, Aaron R. PhD; DiCarlo, Cynthia F. PhD; Wagner, Dana PhD; Krick Oborn, Kellie PhDAuthor Information Department of Special Education, Minnesota State University, Mankato (Drs Deris and Wagner); Department of Educational Theory, Policy, and Practice, Louisiana State University, Baton Rouge (Dr DiCarlo); and Department of Special Education, Eastern Carver County Schools, Chaska, Minnesota (Dr Krick Oborn). Correspondence: Aaron R. Deris, PhD, Department of Special Education, Minnesota State University, Mankato, MN 56001 (email@example.com). The authors declare no conflict of interest. Infants & Young Children: October/December 2020 - Volume 33 - Issue 4 - p 283-299 doi: 10.1097/IYC.0000000000000175 Buy Metrics Abstract It is considered a recommended practice to integrate literacy concepts into child-initiated choice center time long before formal reading instruction begins. The purpose of this study was to determine whether environmental modification and a teacher-mediated literacy intervention would increase child engagement of literacy behaviors during free choice time in the classroom. Data were collected on the literacy behaviors of 9 children across 3 inclusive preschool classrooms in a suburban public school system. A multiple baseline design was used to determine the effects of an environmental modification using the Early Language and Literacy Classroom Observation and a teacher-mediated intervention on children's literacy behaviors. Results included an average increase of 43 percentage points (range = 39–45 percentage points) in observed literacy behaviors in each of the 3 classrooms. Individual children in each classroom demonstrated an increase in literacy behaviors from baseline to intervention. These results are consistent with previous research, which indicated that the modification of the environment and teacher mediation increase literacy behaviors. © 2020 Wolters Kluwer Health, Inc. All rights reserved.