Writing prompt: What Is a Good Teacher?

Student essay:
I think a good teacher explain should have many answers.First,When the student make a mistakes the teacher must be strict and kind because as a teacher must be teach her student how to do it.Second,In spare time the good teacher can be amusing and interesting with her students. Third,the good teacher should favourite students mustn't have difference between the good students and the quite poor students .Next,When the student ill a good teacher should care about the student.Finally,I think a good teacher should be rich in knowledge and must explain things clearly.
That's all.

Corrected essay:
I think a good teacher should explain and have many answers. First, when a student makes a mistake the teacher must be strict and kind because a teacher must teach their students how to do it. Second, in spare time a good teacher can be amusing and interesting with their students. Third, a good teacher should not favour students or show differences between the good students and the quite poor students. Next, when a student is ill a good teacher should care about the student. Finally, I think a good teacher should be rich in knowledge and must explain things clearly.
That's all.