Well if I were to give you a clue from my own dreams, I would say your mother represents one aspect of your self and you represent another aspect of yourself.

Is there some conflict in you about going to school? Is your mother usually a disciplinarian that you hope will just let you play in the park?

How did you feel when you said I can forget school in the dream and then you go with her?

How did you feel when you woke up?