Be sure to express interest and concern for each child in each classroom avoiding favoritism. You will want to get class rosters as soon as possible. In your secondary setting, you will learn names more quickly because you will teach the same students everyday and will probably take attendance. In elementary settings, learning all names in the short time you have is more challenging. You might, therefore, want to think of strategies such as taking a class picture or learn 2 names from each class per day, for example.
Attitudes are important.
Smiles and a cheerful demeanor are noticed by teachers, professors, and by children. Schools should be pleasant places for everyone, you included. During your student teaching, it is natural to spend a little more time observing and waiting when you enter a classroom. However, it is not a good idea to wait for your mentor teacher to tell you what to do. Begin to ask for responsibility early.