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How to become a teacher's aid
Be prepared to take direction.
Being a teacher's aid is about being a great assistant. You'll need to be a team player and devote yourself to making the teacher's job easier.
A good master teacher is likely to take input from you in lesson-planning, rule-setting, and other classroom activities. Keep all of this in mind, but also remember that ultimately the buck stops with the master teacher, not with you, so be prepared to do what they ask and follow their rules! Get some exposure to kids.