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This study aims to determine the characteristics and develop Tic Tac Toe game media in biology learning of excretory system material as a valid, practical, and effective learning media. This type of research is research and development with the ADDIE development model, which includes five stages: Analyze, Design, Develop, Implement, and evaluate. The subjects of the study were students of grade XI Science 1 MAN 3 Bone, with a total of 35 students. The research instruments used are media characteristics sheets, validation sheets, students’ response questionnaires and educators’ response questionnaires, and learning outcome test questions. The results showed that the characteristics of the developed Tic Tac Toe game media were in the very good category with an average value of 100%. The Tic Tac Toe game media was very valid with an average validity score of 3.46. Based on the responses of students and educators, the Tic Tac Toe game media is in the practical category, with an average score of 85.04% and 89.06%. The level of effectiveness is seen based on the completeness of students, which is 91.4%, so it is categorized as very effective. So, the Tic Tac Toe game media is worthy of use because it meets the criteria of practical, effective, and valid.

Characteristics; development; learning media; tic tac toe