All material is my personal opinion, and not that of any other organization.
Permission is granted for individual teacher use.
All rights reserved. Most of us were left not following her explanations at all. I know that I, personally, enjoy figuring things out for myself much better than I do having something explained to me. I could imagine, for example, providing people with various molecular structures on paper, and then having them try to hypothesize which kinds of structures would make the bubble burst, and which kind wouldn't. 1997 Marc, That is an interesting question.