C.C.
I think this is pretty normal. I've found that the longer you stay, the worse it is. If you just walk in, give her a hug and kiss, and then quickly hand her off to her teacher, she will not have a chance to get all worked up. She might start to cry, but by that time, you'll be in the parking lot starting the car. And as soon as she realizes you're not there, she'll stop crying and go play with her friends. When my daughter's teacher told me that the second I was out the door, my daughter stopped crying, I stopped feeling so bad about it! And once I stopped feeling bad, she picked up on that and realized there was no point in carrying on, so she stopped. Now she runs to get to her class. Hopefully leaving quickly will work for you too! Good luck.