Shellymos,
I am in your position! My DD5 is skipping K and going to first in the fall (it is really August, isn't it). We are nervous but it was really the only way to not let the year be a total disaster. She is sad to leave her friends, but she has outgrown many of them already and we are confident that she'll make new ones. We should all contact each other in those first few days for support! My DD9 is also skipping 4th grade, but I'm less nervous about that.