Donghai County's subject teaching platform integrates the large-capacity educational resources of the county's educational resource database and provides teaching and communication services with local characteristics. Among them, teaching design, multimedia display, exercise selection and other columns can provide teachers and students in the county with teaching resources of corresponding disciplines and grades, help teachers obtain information quickly, and help students acquire resources simultaneously for learning and consolidation. In addition, the platform also integrates educational blogs, online testing and other functions. The establishment of educational blog allows teachers to publish the dynamic news, teaching experience, teaching auxiliary resources and extracurricular exercises of the school directly on the Internet. Online testing provides parents and students with a free examination system, which can test students' learning situation at any time.