Extracurricular programs offered in the K-5 school setting are places in which students can affirm their sense of belonging and make developmental, social, and academic progress. This study examines students' participation in one or more of thirteen extracurricular programs offered at a Southern California elementary school; the year in which the study was implemented coincides with students' first year back to full capacity, full day attendance in-person since the global COVID-19 pandemic necessitated closures and restrictions to in-person school attendance. Supplying opportunities for student enrichment, and by extension community enrichment, this study examined correlations between sense of belonging, positive attendance, prosocial behaviors, and academic growth associated with participation in school-based, extracurricular programs. Participants' social construction of reality through the input of "cultural artifacts", "social activity", and "language" was examined using social constructivist and sociocultural frameworks (Kim, 2014; Vygotsky 1934, 1978). Anticipated growth was focused upon social and academic development and tied to standardized testing metrics as evaluative markers, and teacher and parent observation and assessment. The evaluated data for this mixed methods study is inclusive of a linear regression model to determine prediction of correlation between math and English Language arts (ELA) and positive school attendance were correlated to student participation in school-based extracurricular activities. Focus groups, in which semi-structured interviews, occurred yielded the qualitative data. SPSS data outputs using information from all enrolled students in grades 1 through 5, student, parent, and teacher interviews were instructive in determining any positive yield in the case being studied. [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.]