I Think My Teacher Is Racist

So , I recently moved to a new school this year two towns away from where I live . I've always loved singing , acting , drawing and writing and my mother finally found a performing arts school that was right for me . When. I got there , they told me I could choose a major . I could'nt go into Drama , because I'd be missing out on singing and. I could'nt join Vocal because I'd be missing the acting part of it . So I was introduced to Musical Theater which had both things I wanted to do . I joined the class and within the first three weeks started to experience what I think is Racial Discrimination . At first , it started out small . The teacher ( who is a Caucasian male ) would give us songs to practice . I ALWAYS get songs from Color Purple , Dream Girls , and all of those plays that are associated with Black people . Then , he seemed to favor all the white kids in my class , by always giving them singing and acting solos . ( there are black and hispanic kids who have been in his class for years and are very talented and have never gotten a part ). Then , came our first play . I auditioned for a part that happened to be a blonde character , but when it comes to plays , I don't see color . All the white kids kept telling me , " You should be Mitch", who is the only black guy in the play . So I did research on Mitch and he is black with dred locs ( like me , only I'm a girl ) . He was ghetto , and unlike me in any way , and had very little parts . So I dropped him as a choice . Next thing I knew , I was cast as Mitch in the play , and the Asian lokking girl in our class( who is NOT Asian ) got the part of the Asian girl . ( according to the other kids , she always get the Asian parts ). So , I did speak to my teacher about how I felt including my loneliness ( at school , no one talks to me , including teachers ) . He said he wasn't racist and left it at that . Then , I auditioned for another one of his plays as the Latin American character , since I was the only one who could do the accen and voice . However , I got the part of the black woman , who has no lines and is nearly in the play at all . The hispanic girl got the part , and she can't do the accent . Should I say something about it , or should I just keep quiet ?