What do Islamic scholars recommend for male students in schools where female students and teachers do not wear hijab?

In school, there are uncovered non-mahram female teachers and classmates. In this scenario, with mental strength one might refrain himself from looking at fellow classmates of the opposite gender, but it is impractical for one to not look at the teacher while she is teaching. Then if one insists on not looking at the teacher he will lag behind severely in education and it also might give rise to embarrassing and awkward situations. What do Islamic scholars recommend for male students in schools where female students and teachers do not wear hijab?