Lack of concentration learned in grade IVKata kunci: media gayanghetum, pembelajaran tematik terintegrasi, kelas IV semester 1 SD. PENDAHULUAN ~ Pada hakikatnya belajar adalah suatu kegiatan berfikir dan berbuat, oleh karena itu siswa harus turut terlibat dalam proses pembelajaran sehingga terjadi interaksi yang melibatkan beberapa komponen yang salah satunya adalah interaksi dengan lingkungan (Hamalik, 2008: 139). Lingkungan merupakan suatu bahan belajar yang memiliki banyak manfaat.Pengelolaan dan pemanfaatan lingkungan dengan efisien dapat menghasilkan suatu produk pengajaran yang memiliki tingkat edukasi yang tinggi. Namun, fenomena kurang memanfaatkan fasilitas dan lingkungan sering terjadi di sekolah, para guru pada umumnya melakukan proses belajar dikelas dengan pemberian materi-materi secara abstrak yang tidak diperbanyak dengan interaksi. Jika diamati, banyak sekali lingkungan sekitar sekolah yang dapat dimanfaatkan misalnya pohon, tiang bendera, bahan-bahan bekas, dan sebagainya.

The purpose of the present study was to develop KADIR (Koneksi, Aplikasi, Diskursus, Improvisasi and Refleksi) learning model kits for improving students' Mathematical Problem SolvingSkill (MPSS). This study was a research and development study employing the 3-D (Define-Design-Develop). The field try-outs were conducted in Junior High School in Depok, which instruments consisted of the experts' validation sheet, the observation sheet for students learning activities, test, and questionnaire and interview sheet on students' responses toward learning activities. The collected data were analysed using qualitative and quantitative techniques. The study produces KADIR learning model kits consisting of student's worksheet, lesson plans, and an instrument of MPSS. The kits were revised based on the inputs from the experts and the results of the field try-outs. In validity aspects, all of developed teaching kits are valid. In practical aspects, in the first and the second try-outs, both the teachers and the students can use the teaching kids well. This study shows that KADIR learning model can enhance students' MPSS. The improved indicators of MPSS in the field study include identification of problems, description of the physics, planning the solution, executing the plan, and evaluating the answer. The implementation of KADIR learning model also improves students' activity and the students' positive response toward learning activities.