I don't believe in evalution at all but there teaching it at school y can't they teach crationism and evalutio

i only believe in creationism i was taught that but i go to public school and they teach it to us and i feel really uncofterable in cl and i feel like my teacher is pushing evalution to much on our cl and she keeps saying theres all this proof and its really started to effect my learning i don't understand why they can't teach creationism and evalution why only evalution?