Many problems faced by students in participating in the classroom and writing a text. This study discussed the use of write-pair-square strategy to improve the studentsâ active participation in writing descriptive text. The objectives of the study are to find out the implementation of write-pair-square in teaching descriptive text and to investigate the improvement of studentsâ participation and writing achievement after being taught by using write-pair-square strategy. The research focused on teaching of descriptive text by using write-pair-square as the strategy. The subjects are SMA Kesatrian 2 Semarang students. This study used Classroom Action Research that was carried out through a pre-test, first and second cycle activities. The result showed that the studentsâ progress of participation improved. The average score of pre-test was 11.27, post-test 1 was 20.13, and post-test 2 was 30.24. It also showed that studentsâ mastering descriptive improved. The average achievement of studentsâ pretest was 63.27, first cycle test was 70.23 and post test was 77.66. According to this study, I conclude that teaching descriptive text by using write-pair-square as the strategy is helpful for students. It is recommended for English teachers to use Write-pair-square as the strategy for studentsâ improvement of their writing skill.