The problem addressed in this study was that the transition from traditional schooling to online learning during the COVID-19 pandemic caused high school students and teachers to pivot and, as a result, negatively impacted instruction and learning. The purpose of this qualitative case study was to investigate and understand secondary education teachers' perceptions of what training and resources they need to teach online effectively. Two research questions were used to address the problem and the purpose. The research was conducted in a suburban high school in New Jersey with high school teachers. In this single case study, 14 participants, from a population of 76 full-time teachers, were selected to participate in interviews or focus groups. Thematic analysis was used to determine themes from the data collected. The themes that emerged from the first research question were that training on how to use various platforms in a virtual environment would have been helpful in preparing teachers to transition from in-person learning to remote instruction. In addition, training on how to keep students engaged would have been helpful in preparing teachers to transition from in-person learning to remote instruction. The themes that emerged from the second research question were that teachers needed multiple strategies to be successful and needed additional resources. There are several implications from this study. In the transition from in-person instruction to virtual learning, it is important for teachers to be trained so that they can have the relevant skills to teach learners remotely. Teachers must also have the necessary resources and technological devices. In addition, teachers may employ different approaches to communicate with learners and assess them. Recommendations for future research include increasing the sample size, recruiting participants from multiple locations and settings, and utilizing elementary school teachers and college/university staff. [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.]