校種別に応じた水溶液の指導法(小学校生活科を含む) : 「粒子」概念の発達を柱として

概要

論文の詳細を見る
Though the word `solution' is a concept expressing familiar phenomena around us, very few people use it correctly. For example, when I ask one of upper-grade children from a primary school a question: `What is a melting or dissolving thing?', the answer is `sugar,' `salt,' `boric acid,' `aluminum,' `iron,' `oxygen,' `ice cream,' `candy,' `toilet paper,' `glass' and so on. We can't distinguish between `melting' and `dissolving' so easily. That's why we use the word "dissolving" when something makes the shape broken. There are some senior high school students or some university students who can't understand the meaning of transparence and uniformity of solutions correctly. Some students think the dissolving things are so heavy that they go down to the bottom of the water after a long time. Therefore, we decided to research the growing stages about the `dissolving' concept. Concretely, we make teaching plans about schools from kindergartens to senior high schools. We also argue better teaching methods on every situation of every school.