ABSTRACT:
This research was condu cted by selecting quasi experiments and treatment s in the form of
the realistic mathematics learning (RML) model in cooperative settings (Maresko) with numbered heads together (NHT) type in the
subject matter of 3D spaces. The research was conducted in grade ten in eight senior high schools in Makassar during
the school year 2016/2017. The instruments used in this study were the test results of learning, observation sheets,
teachers’ ability to manage learning, student activity observation sheets and questionnaire responses of students to the
teaching and learning tools. The results show that the learning outcomes of students who are taught by the Maresko
model NHT type were included in the higher categories and that it increased significantly the ability of students from the
pre-test to post-test. The activities of students in learning are at least in the positive category, as well as the responses of
students to the tools and learning are included in the positive category. The NHT type Maresko model was quite
effective when implemented in the class, with an effectiveness score of 3.32. Teaching is effective immediately when
applied in grade ten with an effectiveness score of 3.0. Therefore, the NHT type Maresko model was more effectively
applied in the teaching of the subject matter of three-dimensional spaces at the grade ten high school level.
Keywords: Realistic mathematics education, cooperative NHT type, 3D spac
