最後研究者依據研究結果，對教學情況與教材內容設計及未來相關研究提出建議。 ;This study aims at investigating the lesson plan of polynomial derivatives for grade 11 students. Four lectures and one assessment consist the lesson plan which was designed by the researcher and the advisor. This lesson plan regards the form of Taylor as the cutting point. By the end of the lectures, students can sketch the cubic polynomial function and solve the application problems. Basing on the observation and assessment results, this study analyzes and discusses the effects and problems of learning the polynomial derivatives on different level students of grade 11. On the one hand, the result shows that advanced learners can almost aquire all the lessons. And the medium to challenged learners can learn the former part, but over half of them can not learn well on the latter part: sketch the cubic polynomial function and solve the application problems. If the teaching time of the latter part is increased, the learning effect can be better. On the other hand, some students fail to grasp the mathematical language precisely, which happens not only in medium and challenged learners but also in advanced learners. According to the result, the researcher provides some sugesstions for teaching conditions, lesson plan designs and related studies in the future. Keywords: synthetic division, Taylor polynomials, polynomial derivatives
