This essay is talking about whether it is useful to divide classes. This article first tells whether different schools in Suzhou are divided into classes and their situation, which is the result of my investigation and inquiry. And this essay also learned how they are divided into classes. Then this paper talks about whether these students feel good or bad, and whether they will have bad feelings because of the placement. Then the essay collected the placement data and their students' scores from two classes in a high school in Suzhou. In the three exams of two classes, the essay calculated their average values and plotted them into charts. By processing these data, the essay conducted T test. And then, the essay use "H0 (Null hypothesis): the way of class placement isn’t efficient. H1 (Alternative hypothesis): the way of class placement is efficient. "to show what the essay prove. The essay made tables with the results of T test. Through these tables, we can intuitively see that placement is beneficial to students' grades. In the future, the essay can get more accurate results through more research data. These results can help senior high schools divide into classes, make them divide into classes more scientifically, and improve students' grades.

Linda. Is Class Placement Useful: An Empirical Study on Students’ Grades after Class Placement. Frontiers in Educational Research (2020) Vol. 3 Issue 10: 71-73. https://doi.org/10.25236/FER.2020.031016.

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