The purpose of the study is to explore the influence of teaching evaluations on teachers in that they might try to please their students by giving higher grades in order to get higher teaching evaluation scores. To achieve this purpose, the study analyzed the correlations between teaching evaluation scores, student's final grades and course fail rates, and it also examined whether students' final scores and course fail rates are important predictors of teaching evaluation scores. The study used teaching evaluation scores and students' final grades of the courses offered in the fall term of academic year 2014 and the spring term of academic year 2015 in one university in Taiwan as research samples. The results showed that both student's final grades and course fail rates are predictors of teaching evaluation scores. There is a positive correlation between teaching evaluation scores and students' final grades, and a negative correlation between teaching evaluation scores and course fail rates. Based on the findings, the study inferred that the implementation of teaching evaluations may influence teachers to give better grades and lower course requirements to please their students in order to get higher teaching evaluation scores.