Read the advice for students who want to do well in their exams and compare your answers to Pre-Reading 1 and 2 with the text. Chewing for a better grade Wih Nur d chewing gum is very p pular. Annual sales of gum in But perhaps this is not example are over s2 the US. surprising when you leam that Americans on average chew about sticks gum per pen a year work wide. the Wrigley of chewing gum each year- ny sells mkre than $4 a lot gum! says that why is chewing gum so popular? One manufacturer y helps you relax more, but it also helps you to stay awake. This is rearm why the US armed forces have given chewing gum to their soldiers since World War one. People also chew gum atier a meal have fresh breath. It can help tisht tooth decay, ton, which y mean fewer visits to the dentist. But do you know that there's a better reason for dhe wing gum-it ry! Do you have an exam coming up? Well, can improve reviewing is obviously a good idea, but soentists say that chewing know chewing gum can help memory? The rw do the scientists divided 75 people into three groups. One third chewed real wa8w gumL one third chewed imaginary gun and the last third didn't chew anything at all. Then the scentists gave each group a lot of different men tests do. The results were very interesting. The people with real gum did better than the people with imaginary gum. The people with imaginary gum did better than those who didnt have any gum at al 2s How does chewiny gum help memory? One possible reason is thai when people chew there is more activity in an area of the brain that is ant for memory. Another possible reason is that when people cha Yheirheen beats Laster so more oxygen goes to the brain. the three groups all worked at the same speed. They could 301 all decide the answers quite quickly. The scientists said this showed that chewing gum doesn't help you to concentrate better Meanwhile study experts in Chicago are trying to help students who are taking exams, and chewing gum is included in their list of tips. They say that students are under a lot of pressure to get good grades 35 l and they often do the wrong things when reviewing for exams. Many