教学《食物的营养》一课要让学生学会用碘酒鉴别淀粉的方法,通常的教法是老师为学生备好了淀粉和碘酒.让他们动手试一试,滴一滴碘酒于淀粉上,看看有什么变化。学生饶有兴趣地实验,很快就会发现淀粉遇到碘酒能变成蓝黑色,于是水到渠成,教学任务就算完成了。如此轻松,如此高效,实验是学生做的,结论是学生得出的。因此,我们原来以为这样的科学探究是成功的。 Teaching “Food Nutrition” Lesson For students to learn how to use iodine to differentiate starch, the usual teaching method is to prepare starch and iodine for the students. Let them try it and drop a drop of iodine on starch. , See what changes have. Students interested in the experiment, will soon find starch can encounter iodine into blue-black, so it works, even if the task of teaching is completed. So easy, so efficient, the experiment is done by students, the conclusion is drawn by students. Therefore, we originally thought that such scientific inquiry was successful.