Main Article Content
Research through the application of the Numbered Heads Together (NHT) model aims to improve the conceptual understanding of students in the high school elementary school research method used by the author is the class action research (PTK) of the students studied amounting to 40 students in class V. The instruments used in This research is a test instrument, teacher observation sheet and student activity observation sheet. The results of this study indicate that before the implementation of the NHT learning model as many as 7 students (19%) were completed and 33 students (83%) did not complete. However, after using the NHT learning model in cycles I and II, data was obtained that the results of understanding students' concepts increased. The results of the first cycle show that as many as 15 (38%) students complete and as many as 25 (62%) students have not finished. Then the results of the second cycle test showed that as many as 36 (90%) were complete and as many as 4 (10%) were not completed. The increase that occurs in students who have reached (90%) is declared complete.