BigBlueButton is an open-source web conferencing system designed specifically for online learning. Hosted at https://bigbluebutton.org, BigBlueButton facilitates real-time sharing of audio, video, slides, chat, and screen, along with powerful tools for facilitating collaboration and engagement such as whiteboard capabilities, breakout rooms, and polling. Aimed primarily at educational institutions such as universities and colleges, BigBlueButton supports synchronous learning across varied virtual classroom setups. The platform integrates seamlessly with major learning management systems (LMS) like Moodle, Sakai, and Canvas, enhancing its accessibility and functionality for educators and learners alike. With its focus on education, BigBlueButton ensures that virtual classes mimic the interaction of a physical classroom, promoting a comprehensive learning experience.