Implement education and teaching behavior, standardize teaching plan arrangement, reasonably arrange curriculum schedule and work schedule, strictly implement national curriculum plan and curriculum standards, and open all courses and class hours well. The actual teaching time in the compulsory education stage shall not be less than 19 weeks, the summer vacation time shall not be earlier than 15 July, the actual teaching time in ordinary high schools shall not be less than 20 weeks, and the summer vacation time shall not be earlier than July 22. It is strictly forbidden to suspend classes at will or take centralized remedial classes and cramming teaching methods to catch up with the teaching progress and end the course ahead of schedule. In standardizing homework design, schools strictly implement homework management requirements, clarify homework design objectives, enrich homework content and forms, and strictly control the amount and difficulty of homework.