教材版本说明《怎样加快溶解》选自《科学》实验教材教育科学出版社四年级上册。 分析教材: 本课主要使学生通过实验知道搅拌、用热水和把要溶解的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自主经历探索溶解快慢的方法。教师应大胆放手,让学生小组合作、共同动手操作,进行比较概括,从而培养学生实验、比 Teaching materials Version Description “How to speed up the dissolution of” selected from “Science” experimental teaching materials Education Science Press the fourth grade. Analysis of textbooks: This lesson mainly 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 initially learn how to use comparative experiments to explore the method of dissolution speed. Teachers should boldly let go, let the students team cooperation, common hands-on operation, more general, so as to develop students experiment, than