The purpose of this quantitative study was to examine differences in perceived SEL implementation levels across different campus levels (elementary and secondary) when SEL professional development and coaching support were provided to campus staff. A causal-comparative research designed utilized survey data previously collected to examine differences between elementary and secondary school groupings perceived SEL implementation. Data were analyzed using SPSS software to report the frequencies, means, and standard deviations. An independent samples t-test was used to answer each research question. [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://www.proquest.com/en-US/products/dissertations/individuals.shtml.]