Classroom Manager Extension (CME) is a free Chrome add-on designed to assist teachers in managing students' online activities during class. This tool allows educators to create a list of approved websites, automatically blocking access to all others, ensuring a focused learning environment. The extension operates in real-time, providing instant updates to students based on the teacher's settings, which enhances classroom management and reduces distractions.

Key features include intelligent blocking of unauthorized sites, the ability to disable browsers entirely for students, and a secure class code system for managing access. Teachers benefit from an intuitive dashboard that allows them to monitor student activity, view connected students, and make adjustments on the fly. CME ensures a secure connection for students, requiring teacher approval for any classroom exits, making it a comprehensive solution for educational settings.