摘要：This study aims to:know the increase of student’s problem solving skills and teamwork skills. The method used in this research was the Research and Development (R & D) using 4-D models. The population of this experiment were students of class X MAN Yogyakarta III in the second half of the school year 2014/2015. The data were collected through observation and test. The Observation technique was used to determine the student cooperation. Aspects of cooperation skills studied were working productively,responsibility and flexibility. The test was used to determine the problem solving ability of students in the subject Optical Devices before and after treatment. Data analysis technique used was the technique of the increase in gain scores,followed by multivariate test (MANOVA). These results indicate that:Blogs as a media-based learning PjBL can improve problem solving and teamwork skills.
其他摘要：Penelitian ini bertujuan untuk:mengetahui peningkatan kemampuan pemecahan masalah dan keterampilan kerja sama peserta didik kelas. Metode yang digunakan dalam penelitian ini adalah Research and Development (R&D) yang menggunakan model 4-D (four D model).
