The Effect of Blended Learning Approach on Vocabulary Enhancement of Tenth Grade Students' at SMA Negeri 5 Tarakan
Vocabulary is considered one of the important aspects in learning English as a foreign language because it supports students in understanding and using the language effectively. However, many students still experience difficulties in developing their vocabulary. This study was conducted to determine whether a blended learning approach can improve the vocabulary of tenth grade students at SMA Negeri 5 Tarakan. This study used a quantitative approach with a one-group pre-test and post-test pre-experimental design. A total of 35 students from Class X-A participated in this study. Data were obtained through a vocabulary test conducted before and after the implementation of the blended learning approach. The research results were analyzed using descriptive and inferential statistics with SPSS version 16.0. The analysis showed an improvement in students' vocabulary performance, indicated by a higher average score on the post-test compared to the pre-test. Furthermore, the normality test conducted on the difference scores between the pre-test and post-test showed that the data were normally distributed. Therefore, a paired t-test was used to examine the presence of a significant difference in students' vocabulary scores before and after the implementation of the blended learning approach. The paired sample t-test results showed a p-value of 0.000, which is smaller than the significance level of 0.05. Therefore, the alternative hypothesis (Ha) is accepted, and the null hypothesis (Ho) is rejected. In addition, the N-Gain analysis indicated that the improvement is classified in the moderate category. Overall, these findings affirm that the blended learning approach contributes significantly to the enhancement of vocabulary among tenth grade students at SMA Negeri 5 Tarakan.