Peningkatan Keterampilan Bertanya (Posing Question) melalui Penerapan Discovery Learning pada Materi Ekosistem di Kelas X Imersi 1 SMA Negeri 2 Karanganyar Tahun Pelajaran 2013/2014

This research’s aim is to improve the posing question skill of the students in X Imersi 1 of SMA Negeri 2 Karanganyar academic Year 2013/2014 about ecosystem material through discovery learning application.     This research is a class action research which consists of three cycles. Each cycle contains planning, implementing, observing and reflecting. The research subject is the students in X Imersi 1 of SMA Negeri 2 Karanganyar Academic Year 2013/2014. The data source is from the questions that cover the quantity and quality of the question. The question’s quantity is counted from the sum of questions that is given by the students while the question’s quality is counted from the sum of questions’ kind that is given by the students based on their thinking process and knowledge dimension. Data collecting techniques of this research are using observation, interview and documentation then data validation is using triangulation method. Data analyzing technique of this research is descriptive qualitative analysis which is done in three components, they are: data reduction, data presentation and drawing the conclusion or verification. The research’ procedure is using spiral mode which is interdependent. The result of the research shows that the implementation of discovery learning improves the students’ posing question skill that covers the quantity and quality of the question. The question’s quantity improvement from pre-cycle to the first cycle is 70 questions, the first cycle to the second cycle is 46 questions and the second cycle to the third cycle is 20 questions. Then the question’s quality improvement from pre-cycle to the first cycle is 29,16%, the first cycle to the second cycle is 17,18% and the second cycle to the third cycle is 16,14%. This research’s conclusion is the implementation of discovery learning can improve the posing question skill of the students in X Imersi 1 of SMA Negeri 2 Karanganyar academic Year 2013/2014 about ecosystem material.   Key Words: discovery learning, posing question skill