Study of Improving Teaching Materials for the Delivery Practice of Chemistry Experiments Demonstration of Chemical Magic “Sudden Disappearance –Magic Cotton–,” etc.

We have developed teaching materials and methods for chemistry (science) experiments related to people’s daily lives, allowing people to realize that science is a valuable subject and utilize the materials and methods in science learning. We have researched to establish the developed teaching materials and methods by practicing, evaluating, and improving them in the delivery practice of chemistry experiments. The author (T) is going to retire in March 2022. Therefore, we report here the improved method of “Sudden Disappearance -Magic Cotton-,” one of the contents in the delivery practice of chemistry experiments, especially improved after the publication of “Chemical Magic Demonstrations” in March 2018