1. Meaning and concept of flipped classroom

3. Role of the teacher in a flipped classroom
In flip teaching, the classroom teacher serves two functions.

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  He or she guides students in hands-on, enrichment, and reinforcement activities. Examples of these activities include performing lab experiments, completing creative projects or challenges, working in groups, solving practice problems, and answering practice questions.
  
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  The teacher performs the role of a tutor by helping students when they have problems and giving them individualized attention.
  

One thing that the teacher doesn't do in a flipped classroom is give a lecture to the whole class, apart from describing procedures for an experiment or introducing a project.
Potential Benefits of Flip Teaching
Videos Can Be Paused and Replayed
One advantage of flipped classrooms is that when students are obtaining information by watching a video, they can pause or restart the video as often as they want in order to understand it. This isn't possible during a teacher's lecture. Some teachers ask their students to make notes based on a video, just as they would do if they were listening to a lecture in class. This is not only helpful for the students but also enables the teacher to decide whether the students actually watched the video.

Class Activities Can Provide Enrichment

Ideally, the class activities performed in a flipped classroom give students an interesting, clearer, and richer understanding of a topic. If they have already covered the basic facts about a topic at night, the activities during the day can be more challenging. Problem solving, analysis, and application, and creative, practical, and field work are all valuable activities for a flipped classroom.
Teachers will need to choose class assignments carefully in order to promote enrichment for all students. In addition, the assignments must be interesting as well as useful. It would be a shame if the students are willing to do homework but dislike what is done in class. Creating or choosing suitable assignments may be time-consuming when a flipped classroom is first created.

Students Can Work at Their Own Pace

Proponents of flipped classrooms say that they allow students to work at their own pace. If the students are studying a topic that is easy for them they can move ahead rapidly or be challenged by harder or enrichment assignments. When they reach a difficult section they can slow down and get extra help. Some students may need deadlines for assignments in order to complete them within a reasonable time span, however.
There may have to be exceptions to the "work at your own" pace plan if it's used. For example, in some lab experiments safety is very important. All members of the class may need to perform the experiment at the same time so that the teacher can direct and monitor the students' activity and point out potential problems to everyone at once. In addition, it’s important that the teacher isn’t distracted by students performing other tasks in the room during an experiment.

Different Learning Styles Can Be Accommodated

In flip teaching, teachers spend a lot of time interacting with their students and giving feedback. A teacher and student may develop a better relationship because of this interaction. Teachers also have more opportunity to accommodate the different learning styles of their students in a flipped classroom. Students can be given individualized assignments.