The poor school achievement among disadvantaged adolescents is often caused by the unfair treatment as the effect of self-fulfilling prophecy. Self-fulfilling prophecy, also referred as negative expectancy effect, meant that one person’s inaccurate expectations and misperceptions could result in the target person to act in the way that was matched with the false beliefs (Sorhagen, 2013). In this situation, unfair treatments were often involved to cause the poor performance of the target people. For instance, if a teacher held a certain negative expectation to a certain student and paid less help, attention, and guidance to him/her, it was no surprise that the student did poorly in schooling setting. The unfair treatment could directly lead to the decreasing grade and interesting for further