The objective of this study was to develop Kahoot: a game-based technology as media to teach English grammar. Design and Development Research by Branch was the methodology of this study. The respondents of this research were two classes of Year-11 students of SMAN 1 Pontianak. This research was done in three phases of ADDIE approach, which is ADD where the Implement, Evaluation phases were skipped. In the analyzing phase, the researcher observed the students, the teacher, and the school conditions. In the designing phase, the researcher observed the textbook used and the curriculum applied in the school in order to generate a significant product. In the developing phase, the researcher used Kahoot! to develop learning media for the students by combining multimedia such as layouts, pictures, and sounds. Based on the evaluation results from the expert, Kahoot! was feasible and recommended to use for the students’ grammar learning integrated with technology. The students can use technology accessed through their gadgets for learning English grammar with Kahoot!Keywords: Kahoot!, English Grammar, Classroom Technology