THE EFFECT OF NUMBERED HEADS TOGETHER (NHT) LEARNING STRATEGY ON THE RETENTION OF SENIOR HIGH SCHOOL STUDENTSIN MUARA BADAK, EAST KALIMANTAN, INDONESIA

This quasy experimental research aimed at investigating the effect of NHT learning strategy on student’s retention. The design of this research was Pretest-Posttest Non-equivalent Control Design. The population of this research was all the students of class XI of state senior high school in Muara badak, East Kalimantan, Indonesia in the first semester of 2015/2016 academic year. The samples of this research were students of class XI natural science 1 and XI natural science natural 2. There were 30 students in each of hte class. The data obtained from essay tests were analysed using Ancova. The results of the analysis showed that the learning strategy had an effect on the retention. The corrected mean score of the NHT learning strategy was 24.03% higher compared to that of the conventional learning.