just say ur goodbye, give her a kiss and then walk away! don't look back! she will be fine in a few days or a week~~~
my son kept crying and refusing to let go of us for the first week of school, when we were about to leave, and he kept telling us that he didn't wanna go to school (still says so now)... but he usually stopped crying soon after we left... and for the past three days, he didn't cry anymore!
yes, don't worry, the kindergarten always emphasize that parents should love tough. tell her that going to school is lots of fun and say bye. don't drag on too long with her. my daughter kept crying on the first day and even cry to vomit. but she turns out good and love going to school on the 3rd day.