俗话说:尺有所长,寸有所短。五个手指不一齐,这是很正常的现象。同样而言,在学校中,既有品学兼优的优等生,也有成绩和品行双差的后进生。后进生是学校教育教学工作的不利因素,未来也是社会不稳定的因素之一,是令每个教育工作者都十分头痛而又不可避 As the saying goes: feet have a director, inch short. Five fingers are not together, this is a normal phenomenon. By the same token, in schools, there are not only excellent students with excellent academic attainments, but also post-graduates with poor performance and good conduct. The backward students are the unfavorable factors of school education and teaching work. The future is also one of the factors of social instability, which makes every educator headache and inevitable.