Teacher takes an exam the education environment, often focus on the future development of good students, while ignoring the poor students psychological guidance  In 1968, American psychologist Rosenthal made an experiment in a school: he choice of 20% of the students from 18 classes, after he told the teacher, the list of the students is the most promising  After a period of time, the results showed that the students on the list did better than the others
The conclusion: The random list influenced the teachers, who unconsciously gave the students more encouragement and guidance in their daily teaching
Does Rosenthal experiment have some enlightenment on how to help poor students