A famous study was done in a school by a professor(教授) from a university．At the start of the school year，the teachers were given the names of five children．They were told that these five were the most excellent students in the class．But the fact was that these students were only average(中等)，and they were not the best students at all．Well，guess what? At the end of the year，all the five average students scored among the highest in the class．
