课后作业是课堂教学的延伸,是帮助学生有效巩固、理解、消化知识的重要途径。不同类型的作业对复习巩固知识、发展学生的创造力有着不同的作用,合理有效的作业可以将学生从低效的作业中解脱出来,有利于学生的个性发展。一、综合性作业教材中的课后习题主观题比重较大,对习题的难度区分度不高,教师不妨根据学生的实际情况设计不同层次、梯度的综合性作业。如学习了氮族元素可以设计这样一道作业题:通过本节内容的 Homework is an extension of classroom teaching and is an important way to help students effectively consolidate, understand and digest their knowledge. Different types of assignments have different effects on reviewing and consolidating knowledge and developing students ’creativity. Reasonable and effective assignments can relieve students from inefficient assignments and are conducive to the development of students’ individualities. First, the comprehensive homework textbooks in the subjective question after class a large proportion of the difficulty of the problem is not high degree of differentiation, teachers may wish to design different levels according to the actual situation of the students, the gradient of the integrated operation. Such as learning a nitrogen element can design such a homework title: Through the contents of this section