This qualitative study applies the Connectivism learning theory which purports effective learning can occur via modern-day technology. Teacher influencers and their content on TikTok and Instagram, social media platforms, were examined, and the degree to which they can support teacher practices was explored. The purpose of this study was to understand the perceptions that high school teachers have of high school level teacher influencers' role in education and to determine the perception high school level teacher influencers have of themselves in their roles of informing and supporting teacher practices via TikTok and Instagram. Two semi-structured interview protocols were used to understand the experiences of both participant groups of high school teachers and high school level teacher influencers. Purposive sampling was used with teachers completing a recruitment questionnaire and indicating their interest in completing a forty-five minute semi-structured interview. Findings from this study indicated that Connectivism fits the connections and learning that are occurring when high school teachers connect and engage with teacher influencer content on social media platforms like TikTok and Instagram. Teacher influencers are providing access to educational stakeholders into contemporary classrooms, highlighting the innovative educational use of emergent technologies by high school teachers in the United States. High school teachers reported a myriad of positive instructional uses of teacher influencer content. Teacher influencers and their content are also expanding the professional learning communities of high school teachers, reducing professional isolation, and supporting teacher perceptions of self-efficacy. This study begins to amplify the educational potential of emergent technologies like social media platforms to support and inform teacher practices and ultimately improve student outcomes in the 21st century and beyond. [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.]