一、问题的提起 我校是一所县级高中,每年入学的新生共八个班,其中全县择优统招四分之一,其余又按学区划片并以城镇和农村两种分数线招收。因此,学生之间在知识、能力、心理诸方面的综合素质的差异很大。面对参差不齐的教学对象,如 1. Introduction of the problem Our school is a county-level high school. There are eight classes for freshmen enrolled each year. Among them, the county selects the best one-fourth. The rest are divided by school districts and are recruited on both urban and rural points. Therefore, the overall quality of students in knowledge, ability, and psychology varies widely. Facing irregular students, such as