Increasing the Second Year Students’ Vocabulary Mastery by Learning Word Classification at MTs Madani

This research aims at knowing the increasing the second year students’ vocabulary by learning word classification at MTs Madani Pao-Pao Gowa. The problem statement of the research was; to what extent does the learning of word classifications increase the students’ vocabulary at MTs Madani Pao-Pao Gowa? The method used in this research was true-experimental design which was applied with two groups namely experimental group and controlled group by using pre-test and post design. The population of this research was the second year students of MTs Madani Pao-Pao Gowa in 2011-2012 academic years. The sample of this research consisted of 27 students taken by applying purposive sampling technique. The researcher took class A as control class and class B as experimental class where each class consisted of 27 students. The research variables were Word Classifications as independent variable and the students’ vocabulary as dependent variable. The research finding was learning word classification able to increase the students’ vocabulary. The mean score of students pre-test in experiment group was 4.92 and the students’ score in post-test was 8.96. The mean score of students pre-test in control group was 6.11 and the students score in post-test was 6.72. From t-test, the researcher found that the value of t–test 5.78 was higher than t-table 2.00 at the level of significance 0,05 with degree of freedom (df) = 54. Based on the fact, the researcher concluded that learning word classification was effective to increase the second year students’ vocabulary