著名心理学家、教育家布卢姆曾说:“只要在提供恰当的材料和进行教学的同时给每个学生提供适度的帮助和充分的时间,几乎所有的学生都能完成学习任务或达到规定的学习目标。”可见,分层教学的教育教学思想是古今中外教育教学所必须遵循的一条重要原则。新课标指出:“人人学有价值的数学,人人都能获得必须的数学,不同的人在数学上得到不同的发展。”对教师来说,教学要从每一位学生的基础出发,努力为他们创造良好的学习氛围,激发学生的学习兴趣, Bloom, a famous psychologist and educator, once said: “As long as every student is given adequate help and sufficient time while providing the right materials and teaching, almost all students can complete their study tasks or achieve ”It can be seen that the education and teaching thought of the hierarchical teaching is an important principle that must be followed in education teaching at all times and in all countries. The new curriculum standard states: “Everyone learns valuable mathematics, and everybody can get the necessary mathematics, and different people get different developments in mathematics.” For teachers, teaching should be from every student Based on the starting point, and strive to create a good learning atmosphere for them, to stimulate student interest in learning,