Flipped classroom is a new instructional strategy and popular trends in education. A flipped classroom is one where students are introduced to content at home, and practice working through it at school. In flipped classroom Students watching online video lectures and reading any materials relevant to the next day class. In traditional classroom subject contents are received by the students in fixed amount of time. Flipped classrooms become a mastery learning approach for that every student to master subject knowledge before going to further content. This technique will be suitable for all the subject especially for computer science students. The main purpose of this research is to check the effectiveness of flipped classroom in computer science teaching for higher secondary students. The researcher being a computer science teacher, She prepared a E-content video lesson on Theoretical concepts of Operating System which is in Volume-I, Unit-I, Chapter 4 of XI Standard Computer Science text book in Tamil Nadu State Board Samacheer Kalvi new syllabus.

Keywords : Flipped Classroom, Effectiveness, Computer Science Teaching and Learning.