To the Principal and the Gifted Coordinator. Keep the request short and sweet, save the portfolio for the meeting. Don't request a meeting - you'll have more of those than you want.
Something like:
DS is acting sadness and tears up on Sundays when I mention that tommorow is a school day. I believe that he is incorrectly placed in the 1st grade and would be happier in the 2nd grade. Please start the process for correcting this situation.
Try to keep it that short, although I'd love a better phrase than 'incorrectly placed.' What I ended up saying, was, "DS has been 'in need' of a grade skip for many year, but now we are really in trouble.
Best Wishes,
Grinity
