Ditto to what has already been said. I'd suggest using this meeting to let the teacher tell you what she knows and how she sees your son. My biggest advocacy tip: be friends. You want the teachers on your team! It's never good to establish an adversarial relationship with that teacher.

Just a BTDT story now. My son was also early entrance into first. He was also 5 years 5 months when he started (March bday, perchance?!). After 6 weeks of first grade MrWiggly asked, "When does second grade start?" When I told him not until the next year he said, "WHAT?! But I'm *through* with first grade already! Why do I have to wait so long for second??!"

Out of the mouths of babes. Good luck - the fun has just begun!