Yes, my younger son is like that too. He came home from first grade the other day and said very excitedly, "mommy! We learned how to tell time today!"
I finally pointed out, "hey, you already know how to tell time! Remember?" He learned in preschool and we revisited it in kindergarten.
Having a child who is eager to please has good and bad points. At least she will probably do her homework or boring repetitive work, to a point, just to please the teacher. On the other hand, like my younger son, she may never say, "I know this already, can you give me more advanced work?"
