作业是教师学科有效教学的重要抓手,也是考查学生主体学习效果的重要媒介,更是学生学习进步发展的有效阶梯。俗话说,万丈高楼平地起。实践活动的有效达成,离不开精心的准备和充分的预设。作业教学同样如此,需要切实做好课前预设工作。笔者发现,有不少初中数学教师忽视课堂作业的预设活 Homework is an important starting point for effective teaching of teachers and an important medium for examining students’ learning results. It is also an effective ladder for students to learn progress and development. As the saying goes, lofty tall buildings play. The effective realization of practical activities can not be separated from meticulous preparation and full presuppositions. The same is true of homework teaching, you need to do a good job of pre-class work. I found that many junior high school mathematics teachers ignore the preconceived work of the class