《怎样加快溶解》是小学自然教材中的经典内容,各版本中均有此内容,苏教版安排在第五册《食盐哪里去了》一课后进行。此课教学目的在于使学生通过实验知道搅拌、用热水和把要溶解物质碾细等方法可以加快溶解,使学生初步学会用对比实验的方法探究溶解快慢的方法,并培养学生的实验能力和比较概括能力以及仔细观察、善于思索的科学精神。 “How to speed up the dissolution” is the classic content of primary natural teaching materials, all versions have this content, the Sujiao version arranged in the fifth book “where salt went” after a class. The purpose of this lesson is to enable students to know through experiments stirring, with hot water and to dissolve the material grinding and other methods can speed up the dissolution, so that students learn how to use comparative experiments to explore the method of dissolution speed and to develop students' experimental skills and More general ability and careful observation, good thinking of the spirit of science.