Purpose: The purpose of this paper is to examine teachers' experiences with mental health during the COVID-19 pandemic. Design/methodology/approach: The authors administered an online survey to full-time public school teachers simultaneously enrolled in a master's degree program in education. Out of 455 teachers who were sent the survey, 96 completed it, resulting in a 21.1% survey completion rate. The survey was composed of both quantitative and qualitative items which assessed teachers' self-perceptions about their mental health before and during the COVID-19 pandemic, as well as their use of mental health resources. Most questions were drawn from the Patient Health Questionnaire-4 (PHQ-4), so focused primarily on symptoms of depression and anxiety. Findings: The results of the survey indicated that overall, teachers felt an increase in symptoms of anxiety and depression between March 2020 and February 2021. A noteworthy percentage of participants said they were seeking mental health supports. Research limitations/implications: This study was conducted with teachers in an alternative certification program, so their experiences might not be widely generalizable to teachers enrolled in traditional pathways to certification. Originality/value: While some research has been conducted on mental health, less has been conducted with public school teachers and even less has assessed the impact of the COVID-19 pandemic. This study aims to add to the existing literature about teachers' experiences with anxiety and depression, as well as the specific impact of COVID-19.