一、问题的提出。南昌三中张富老师经过长期教学实践和对学生跟踪发现:每个学生在学习过程中,采取三种不同姿态,使出三种不同能力,形成三种不同时段。如果把学习比作摘果实,有时站摘,使常能,形成一般发展的中常时段;有时蹲摘,使弱能,形成智力萎缩的低差时段;有时跳摘,使潜能,形成潜能释放的良好时段。从横向看,每班学生与学生之间存在差异,分优中差生;从纵向看,每人后段与前段之间存在差异,分好中差时。实践证明,基础差的人,只要不断出现“好时”,最终必然成为优生;基础好的人,只要不断出现“差时”,最终必然成为差生。教学中如果实行因 First, raise the question. Teacher Zhang Fu of Nanchang No. 3 Middle School found out through the long-term teaching practice and tracking of students that each student adopts three different postures in the learning process and uses three different abilities to form three different periods. If we compared learning to fruit extraction, we sometimes picked up and used it regularly to form a normal period of general development. Sometimes we picked up and made weak energy to form a period of low-grade mental atrophy. Sometimes skipping picks up potential and releases potential. Good time. From a horizontal perspective, there is a difference between students and students in each class, and there are poor students in the middle of the class. From the longitudinal perspective, there is a difference between the back and front sections of each person, and when there is a good middle school difference. Practice has proved that people who have a poor foundation will continue to be prosperous as long as they continue to have “good times.” People with good foundations will eventually become poor students as long as they continue to have “bad times”. Teaching if the cause