Social media use has spiked around the world during the COVID-19 global pandemic as people reach out for news, information, social connections, and support in their daily lives. Past work on professional learning networks (PLNs) has shown that teachers also use social media to find supports for their teaching and ongoing professional development. This paper offers quantitative analysis of over a half million Twitter #Edchat tweets as well as qualitative content analysis of teachers' question tweets (n = 1054) and teacher interviews (n = 4). These data and analyses provide evidence of the kinds of supports that teachers in the United States and Canada sought on social media during the rapid transition to emergency remote teaching in Spring 2020 and how these supports informed teaching practices. These results provide insights into PLN theory and teachers' social media use during times of disruption and crisis.