According to the query of Pacific Science and Technology official website, it is a professional online classroom software, which supports various teaching scenarios such as 1 to 1, small class, large class, big live broadcast, double teacher and so on. In addition, ClassIn supports a variety of teaching courseware, including PPT with animation, video, audio, Word and PDF, and allows multiple courseware to be combined for teaching to meet more teaching scenarios. So ClassIn is a safe educational software.