Catalyst, a club founded by high school students in Redmond, WA, aims to introduce students of all ages to computer science and make it accessible to everyone. The club uses Repl.it as a tool to teach coding skills, particularly for online learning, where they can assign tasks, check progress, and annotate code. Catalyst's mission is to provide relevant CS exposure to K-12 students through problem-based learning, and Repl.it has been instrumental in making remote learning seamless and engaging for their students. The platform's features, such as live coding editing and multiplayer capabilities, have helped foster communication and problem-solving skills among students, while its ease of use has made it an integral part of the club's classes.