From Do teachers discriminate against minorities in India? (ungated version of the original paper here):
"Teachers discriminated against minority students in the grading of exams, but the results were modest. It is important to note that our study only facilitates reflection on one element of discrimination within the classroom. Other, more blatant types of discrimination may exist in the classroom as well. If we hope that education can help “level the playing field,” further work needs to be done to understand how to improve the treatment of minority students in the classroom."
P.S. Related post by Anoop Kumar Pandit Ramchandra Guha and the post of Mysore University Vice-Chancellor -II (via Blogbharti)