Pengembangan Bahan Ajar Menulis Esai Berbasis Lingkungan Menggunakan Model Problem Solving Untuk Meningkatkan Kemampuan Berpikir Kritis Siswa Kelas V Sekolah Dasar

The Development Of Teaching Materials Of Environment-Based Writing Essays Using Problem Solving Model To Improve The Critical Thinking Ability Of The Grade Five Students Elementary School

This the research and development of environmental based teaching materials using problem solving model would be hopefully able to improve the critical thinking ability of the fifth grade students elementary school, it will result a teaching material product that is effective, practical and attractive at topic our friendship environment; and to describe ability the critical thinking, student respons, also obstacles faced in the implementation this research and development. the research and developmentwhich refers to design apply a model advanced by Borg and Gall. The subject of the research is the students grade VB of SDN Sidotopo II/49Surabaya and the students grade VB of SDN Sidotopo IV/51 Surabaya as an experiment class as well. There is no a control class in this research. The trial was contucted using one grub pretest - posttest model. In case of the teaching materials application in writing environment-based essays. The preferred research and development. in its design to improve the ability of critical thinking of students in applying the teaching materials of writing essays. The result of this research and development indicated to (1) development process of teaching materials of environment-based writing essays using problem solving model by Borg and Gall that contains of 10 steps of development design. (2). The quality of the teaching materials product writing essays on validity aspect by 91% to 95%. (3) The quality of development product on practicality aspect involving the result of teacher and student responses after using the teaching materials for writing environment-based essays by 82.5% to 95%. (4) Teaching materials of environment-based writing essays using problem solving model are effective in improving the critical thinking ability. This is evidenced by the presentation of completeness in the 90% knowlage domain. From the result of this the research and development it can improve ability of student critical thinking after applying the teaching materials in writing environment-based essays using problem solving model.