“All Screens” is an online learning platform that engages and educates students at scale. Because of the COVID-19 outbreak, our institution has moved to online teaching for a few months and now online teaching becomes the worldwide hottest topic for all schools! To be honest, none of the online teaching solutions meet the real need for running online lab sessions. All existing online teaching solutions are just for online-meeting or one direction broadcast! Teachers are 100% no way to know your students are really working on their exercise at home or they are just open the online-meeting apps, and then doing other stuff! “All Screens” provided an AI virtual tutor (Miss Ma) can answer the basic questions of the students at any time after digesting the uploaded teaching materials in cloud, which is produced by augmented reality (AR) and 3D animation design technology , which can enhance the learning atmosphere. The system has won an award in AWS AI Hackathon (Global IT Competition) and supports multiple languages. The latest version has been introduced in March this year and has been adopted by numerous overseas universities.