Inequities exist in the foundations of our society, which includes education. These inequities specifically affect marginalized students in their ability to access and have opportunities in STEM (science, technology, engineering, and math) at the elementary level. This action research project sought to investigate and strengthen the interest in STEM topics and ideas and provide more access to STEM at the elementary level. Specifically, this project focused on how to support and aid teachers at Harbor Elementary School to help increase their confidence in providing STEM opportunities for their students. The research for this project was conducted at a K0-6th grade elementary school in a city school in the Northeast. During Cycle One, interviews were conducted and surveys were completed around STEM access at the elementary level, inequities that exist, and how the staff at Harbor Elementary felt about these topics. In Cycle Two, a professional learning community (PLC) of STEM teachers was created to share expertise, create community, and help brainstorm how to help the rest of the teachers gain more confidence around STEM and integrate it more effectively into their classrooms. Also, a professional development series was created and delivered to each of the grade bands at Harbor Elementary. This action research project concluded that (a) inequities in education exist that lead to the lack of access, (b) using an interdisciplinary approach is beneficial, (c) teacher collaboration is key, (d) educators have a huge impact on student confidence and engagement in STEM, and (e) increasing exposure to STEM at the elementary level builds important skills students need to pursue and succeed in STEM. Implications for the Harbor Elementary and other similar contexts include having PLC's of educators teaching similar topics, opportunities for collaboration, advocacy for STEM topics to be integrated, and the need of being reflexive about one's teaching. Keywords: STEM, action research, inequities, PLC, professional development. [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.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]