J.C.
I am a kindergarten teacher and I would really want to know if one of my students didn't want to come to school! I think you should talk to the teacher. I agree with the others that it could be that someone/thing is bothering her. In most situations, school isn't boring - even for high achieving students. I have had students tell their parents that they don't want to come to school and later found out the reason was a 'friend' said he/she wouldn't sit by them on the bus anymore or on a different occasion that someone was calling them by the wrong name. To the children, these were a really, really big deal - mainly because they hadn't had to deal with kids not being nice before. Good luck!