2. Method This type of research is

2. Method This type of research is a descriptive qualitative research. This study was conducted on three stages, i.e. preparation, implementation and analysis. In the preparation stage, the researcher prepared several instruments, including teaching materials, observation instruments, questionnaires and interview. In his observation time, the author was helped by the teachers. The observers observed the students during the activity based on the available observation instruments. After doing it, then the students were asked to fill out the questionnaires individually. At the implementation stage, student work on the activity sheet. There were two kinds of activities done by students. The first, it was about students’ activity used the APOS theory stages. They understood that the derivative is limit function. In the second activity, they did the task by answering three questions about derivative function. Questionnaire data were analysed per student and the scores were calculated based on Likert scale. 3. Result and Discussion Before this teaching material were given to the students, it has been which categorized as valid and practical. The writer firstly consulted it to the experts, and they validated it. The objects on research subject are forty students from the eleventh grade of Natural Science Program 1 of SMAN 2 Palembang. It was conducted in three meetings. In its implementation, the students were divided into 7 (seven) groups, each of them has member around five or six. Based on the 2013 curriculum, beside using five basic points: observing, asking, gathering information, associating, and communicating, a teacher must be able as the facilitators to learners in constructing their own knowledge. So, the writer created each group to read, discuss and conduct activities based on teaching material in order to be able to solve the problems given. In the third meeting, at end of learning, students were given individual task to drill them.