I think that an english teacher should explain to the students everything that they don't understand. Also, I think that the teacher have to teach always the children new words.
To my mind the teacher must speak only english all the time because that will help us to communicate in english and learn how to prononce or work at our accent.
The teacher should make the lesson fun so that every classmate will pay attention.
And, I would really like If we sing some songs because I noticed that singing in english is really helping me to learn new things and prononce better like native speakars.
So, dear teacher please follow my tips.