iClass is an real-time interactive teaching and learning platform on cloud, it focuses in enhancing the interactiveness in the classroom. This system consists of “Teacher Platform” (HTML5 version) and “Student Platform” (iOS version + HTML5 version). Teacher can login to the “Teacher Platform” and post various kind of activates, such as “Drawings”, “Keywords”, “MC Questions”, “e-book”, “Peer Review” and “Web Browser”. Students can login their “Student Platform” to collect the teaching materials