In this presentation, we introduce Slack, a workplace messaging app with over 10 million daily users that aims to make email go the way of corded landlines. As a tool in the classroom, Slack can increase the types and frequency of peer-to-peer and peer-to-professor interactions and decrease repetitive and lengthy student emails from your inbox. While it’s a platform suitable for face-to-face, hybrid, and online classrooms, each distinct modality reveals Slack’s various purposes, capacities, and strengths. From online group work to real-time backchannel to crowdsourcing student questions, we share how we have used Slack in our classes over two years, what students need to get started, and their feedback. All participants will leave with hands-on experience in a Slack channel as well as ideas for how to immediately implement it in their own classes.