Chewing gum is against school rules, but what about when it makes you a better mathematician? After

Chewing gum is against school rules, but what about when it makes you a better mathematician? After vigorously chewing bubble gum and blowing big bubbles, Mrs. Seasly and the junior girls discovered that the rate of change of the bubble's volume was related to the rate of change of its radius. This is one among many applications of the derivative in their Calculus class.