exclusion

today a new student came to my school. she has special needs. she was dropped out from the list of another school. why?
i wonder why schools today i like that...that most of those with intellectual superiority are preferred and entertained but most with special needs are excluded? WHY the exclusion? don't they have the gifts too, that others have? maybe not on the cognitive part but surely GOD created them for a purpose. surely, GOD does not exclude them from HIS list. He has a purpose for every Creation He makes. but why do people or institutions nowadays exclude those who are differently able?
if God showers the same rain to both the good and the bad, saints and criminals alike; why can't people practice the same?