The purpose of this mixed-methods study was to continue the efforts of other researchers in determining whether enrollment in a Pre-K classroom had any impact on students' literacy and math achievement scores in kindergarten. The researcher conducted a two-way repeated measure ANOVA model for the study. The study sample included 6 teachers and 76 students. After reviewing the findings from the study, there was substantial evidence to support the researcher's position that Pre-Kindergarten academic achievement and socialization significantly impact the transition into, and during the Kindergarten. The Literature Review substantiated the researcher's position that Pre-K enrollment is a significant predictor of the student's overall Kindergarten experience. Moreover, it revealed teachers' perceptions of readiness, favoring Pre-K enrollment. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]