What was Miss Richards?

Hello, everyone. I’ d like to tell you a story about Miss Waldorf.Miss Waldorf was a teacher at a school for boys and girls. She taught chemistry and physics for all the students from different grades in the school. Sometimes the new classes learned rapidly, but sometimes they were very slow, and then Miss Waldorf had to repeat things many times.One year, the first class had been studying chemistry for several weeks when Miss Waldorf suddenly asked, "What is water? Who knows? Put up your hands." There was silence for a few seconds, and Miss Waldorf felt sad but then one boy raised his hand." Yes, Danny?" said Miss Waldorf encouragingly. He was not one of the brightest students in the class, so she was glad this boy could answer." Water is a liquid which has no color until you wash your hands in it, then it turns gray," the boy replied.