What's wrong with the class optimization master binding mobile phone deduction?

There is no charge for the class optimization master to bind the mobile phone. According to relevant information, the master of optimization is completely free. Class teacher optimization app is a class management application specially designed for teachers, which brings more convenient ways for students and classroom management. Students can comment with one click, generate intelligent analysis reports, and bring them to exclusive users to download and use. Many teachers manage classes synchronously, which can be used on websites, mobile phones and PCs. The Master of Class Optimization (EasiCare) is a model.