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A recent Baylor College of medicine study shows that 108 students who chewed gum during math classes did 3% better on tests, had an higher rate of paying attention and even took breaks less frequently to step out of the classroom. I would look at this as the following, the chewing and moving the jaw up and down and saliva reaction might help slightly reduce fatigue and keep the person more alert even if it is an almost subconscious like habit that is done. If this is even a remote chance of being true, wouldn’t you encourage students to chew some sugarless gum during class and during taking tests so that they might absorb more information or do slightly better?
-Justin Germino