一些教师曾向笔者发问:“多少年来,社会、家长一直呼吁教师减轻学生学习的负担;报刊也登文要教师少给学生学习压力;就连漫画都讽刺教师只知让学生背书,不知给学生自由活动时间等等。其实,教师也不愿如此。可是,如果没有这些压力和负担,那么教学任务怎样完成? Some teachers once asked the author: "For so many years, society and parents have been calling for teachers to reduce the burden of students’ study. The newspapers and journals have also demanded teachers not to give students any pressure to study. Even the comic satirical teachers only allow students to endorse and do not know to their students Free time, etc. In fact, teachers do not want to do so, but without these pressures and burdens, how can the teaching task be completed?