一、在导入新课前操作一些数学定理、计算公式是我们前人探索、发现,经过反复论证归纳出来的。教师在教学时不要把现成的结论端给学生,而应该引导学生自己去发现、去验证。在新课预习时,可布置一些实践性的作业,让学生动手操作。这样,既可以激发学生学习新知识的兴趣,又能培养学生动手实践,发现规律的习惯和能力。例如:在教圆周长一课之前,可布置学生在家中量一量几个圆形物体的直径、周长各是多 First, in the introduction of a new class before the operation of some mathematical theorem, the formula is our predecessors to explore, found, after repeated arguments summarized. Teachers should not give ready-made conclusions to students while teaching, but should guide students to discover and verify themselves. In the new lesson preview, you can arrange some practical work, so that students do it manually. In this way, students can not only stimulate the interest of learning new knowledge, but also cultivate students practice and find regular habits and abilities. For example: teaching a lesson in the circumference of the circumference, students can be arranged at home in the amount of a few round objects of diameter, the circumference is more