This course is about the 3-4-1 system of play for the 9v9 Youth Game format. It is a progression from the 2-3-1 system of play used for the 7v7 Game format, as part of a game development model for youth players U9 to U12. This course provides the student-Coach the opportunity to learn all the aspects of this system of play, from building play from the back to the different ways of penetrating in the final third and create scoring opportunities. The use of presentations, game animations, and graphical illustrations will provide the student with a better learning experience of the subject. Additionally, the author has provided proven practice plans related to the subject, assignments to challenge the student coach in its learning, and fun quizzes to check the level of learning at each lecture.