Vocabulary is one of the English components. Vocabulary mastery is a key element of foreign language learning. In learning a foreign language, vocabulary has an important effect on reading, writing, speaking, and listening skills. Lately, the students got confused and felt afraid about they vocabulary mastery. It is because they did not understand about English language or they were afraid to make mistakes in English. That is way, the researcher conduct this research which is aimed to investigate the effectiveness of using Project-Based Learning method to teach vocabulary mastery at eighth graders of MTsN 9 Nganjuk. The aim of this research was to investigate whether there is any significant difference on vocabulary mastery between students taught using Project-Based Learning Method and students taught using Direct Method. The design on this research was Quasi Experimental research design that used one group as experimental class and another group as control class. This design uses pretests and posttests to assess students vocabulary mastery before and after treatment. The total sample is 46 students from 8th graders of MTsN 9 Nganjuk. Samples was taken in two classes, one class serving as experimental class VIII-D with 23 students and the other class serving as control class VIII-C with 23 students. Researchers collected data using the instrument in pretests and posttests. The test equipment multiple choices. By using quantitative design in quasi experimental method, the researcher tests the hypothesis that has been formulated based on the problem statement by calculating data using SPSS 21.0 version. The result of this study showed that the mean pre-test in experimental class was 51.83 that categories as poor and the mean of control class was 34.78 that categories as very poor. Besides, the mean of post-test in experimental class was 74.78 that categories as fairly good and the mean score of control class was 50.26 that categories as poor. The result of ANCOVA showed that the significant value (Sig.) is .000 which is less than .05. It means that the H0 (null hypothesis) is rejected and Ha is accepted which it means that there is significant difference on vocabulary mastery between students taught using Project-Based Learning method and students taught using Direct method of the eighth graders of MTsN 9 Nganjuk. It can be concluded that Project-Based Learning can have an impact on the students teaching vocabulary mastery.

Nurfahana , Intifada Azwa .   (2024). The Effectiveness Of Using Project-Based Learning Through Flash Card To Teach Vocabulary At Eighth Graders Of Mtsn 9 Nganjuk. IAIN Kediri