THE EFFECT OF PROJECT BASED LEARNING MODEL ON THE STUDENTS’ VOCABULARY MASTERY AT ELEVENTH GRADE STUDENTS’ OF SMK SWASTA PGRI 20 SIBORONGBORONG IN ACADEMIC YEAR 2023/2024

Abstract

This study aims to find out the significant effect on the students’ vocabulary mastery by using project-based learning models at SMA Swasta PGRI 20 Siborongborong. The writer used quantitative research and an experimental design. The population of the research was the eleventh-grade students’ of SMA SWASTA PGRI 20 Siborongborong in academic year 2023/2024 with total 300 students distributed in 10 classes, from this population 20% of the population is taken so the sample size 20% x 300 students’ = 60 students. Two classes were taken as the sample by using random sampling. The sample than was divided in to two groups’ namenly experimental group and control group. Each of the group consisted of 30 students. The experimental group was taught by using project-based learning models, while the control group was not using models. The instruments for collecting data used giving plan, pre-test, treatment and post-test. The data were analyzed by using t-test formula. The result of the t-test showed that the value of t-test higher that the value of t-table (3,01 > 2,00) at the level significant 0,05 with the degree of freedom 58. Since the value of the t-test exceeded the value of t-table, the null hyphothesis (Ho) was rejected and the alternative hyphothesis (Ha) was accepted. Its means that the project-based learning models give significant effect on the students’ vocabulary mastery.