Teachers' Professional Quality Modeling based on the Coefficient of Variation Method

In this paper, aiming at the problem that improves the professional quality of junior middle school English teachers we conducted a study, and put forward an evaluation model of junior middle school English teachers' professional quality under the background of "the trinity" based on the coefficient of variation method. Coefficient of variation method is the direct use of the indicators contained in the information obtained by calculating the weight of indicators. Is an objective method of empowerment. The results show that we need to combine "the trinity" English teaching model with traditional model in order to improve junior middle school English teachers' professional quality comprehensively. Although the former is superior to the latter on evaluation of the overall, the roles that two kinds of teaching modes play are different on improving the English teachers' professional quality. The former pays attention to improving the ability of organization and coordination and the communication ability with students, the latter pays attention to improving teachers' professional knowledge and written expression ability.