夸美纽斯说:“提供一种既令人愉快又有用的东西,让学生的思想经过这样的准备以后,他们就会以极大的注意力去学习。”有效的课堂导入犹如乐师弹琴,能起到先声夺人的效果,从而引起学生学习数学的兴趣。一、以旧引新,设计问题情境例如,四年级教学亿以内数的读法,由于在三年级,就已教学过万以内数的读法,很显然,亿以内数的读法,就是建立在万以内 Comenius said: “Providing something that is both enjoyable and useful for students’ minds to go through with such preparation, they learn with great attention.” "Effective classroom introduction is like a musician Playing the piano, can play a pioneering effect, causing students to learn mathematics interest. For example, in the fourth grade, the number of readings in the teaching is within a few hundred million. Since in the third grade, it has taught readings in tens of thousands of copies, it is clear that readings of within one hundred million are clearly established Within the million