클래스툴 is an online-based classroom tool designed to facilitate smooth interaction between instructors (teachers) and learners (students) during classes. Instructors can deliver various forms of instructional content to students based on educational objectives, while students can engage in real-time activities and submit assignments. To begin a class, instructors create classes on the web page, and students can join using the designated class code, number, and name via the student application.

The key learning features of ClassTool include web link transmission, content delivery, OX quizzes, multiple-choice activities, open-ended activities, whiteboard functionality, automatic student response storage, as well as features like selecting presenters, timers, and attention alerts.