The impacts of the COVID-19 pandemic throughout the world continue. These impacts influence many aspects of life, work, healthcare, and education in the U.S., which are drastically affected by the COVID-19 pandemic. Thus, a considerable challenge to tertiary-level education has been how to adapt our teaching styles and modalities to keep all stakeholders (students, faculty, teaching assistants, and staff) safe in lectures and labs. This viewpoint presents 15 teaching lessons and tips for undergraduate and graduate STEMM (Science, Technology, Engineering, Mathematics, and Medicine) education for face-to-face, hybrid, and distance learning. The goal was to describe teaching strategies that could be adaptable to most STEMM courses, independent of the classroom size, which is valuable for those educational settings capable of migrating from a classroom to either a hybrid or strictly online teaching environment. Although some of these teaching tips were straightforward, we believe collectively that they (1) provide safety and stability to the students and the instructors; (2) help to improve communications between faculty and students that the pandemic had strained; (3) strengthen student attention; (4) facilitate the transition from the classroom to online teaching; (5) enable the use of new technologies; and (6) offer teaching practices we imagined for educational scenarios post-SARS-CoV-2. Finally, we hope these teaching strategies offer valuable insight as we continue to navigate STEMM education during the ongoing COVID-19 pandemic.