Abstrak
This study aims to determine the impact of Project-Based Learning (PjBL) assisted by Google Sites on the writing skills of 11th-grade students at SMK Negeri 4 Tarakan. This study employed a quantitative approach with a quasi- experimental design involving 62 students from 11th-grade DKV 2 and 11th- grade DKV 3 classes. The 11th-grade DKV 2 class was designated as the experimental group, while the 11th-grade DKV 3 class served as the control group. Data were collected through pre-tests and post-tests focused on students' writing skills. The data were analyzed using descriptive statistics, normality tests, homogeneity tests, and a paired-samples t-test. The results showed that the average score of the experimental group increased from 73.39 on the pre-test to 78.23 on the post-test, representing an increase of 4.84 points. The results of the paired-samples t-test showed a statistically significant difference between the pre- test and post-test scores in the experimental group ( t = - 3.606 ; df = 30 p = 0.001 ) In contrast, the mean score of the control group increased from 75.81 to 77.26, but the difference was not statistically significant ( t = - 0.85 ; df = 30 p = 0.402 ) These findings indicate that the implementation of Project-Based Learning (PjBL) assisted by Google Sites has a positive and significant effect on the writing skills of 11th-grade DKV 2 students. Thus, the implementation of PjBL assisted by Google Sites can improve the writing skills of 11th-grade DKV 2 students.