This is an older post (from August, 2015), but I just found it and I think there are some excellent points herein. It is from Everyday Feminism, and it is titled: 10 Ways Well-Meaning White Teachers Bring Racism Into Our Schools.
From the post:
…considering that 80% of our teachers are White while nearly half (and growing) of our students are youth of Color, part of improving teaching practice means paying more critical attention to race in our schools.
Though I know there are actively racist teachers out there, most White teachers mean well and have no intention of being racist. Yet as people who are inscribed with Whiteness, it is possible for us to act in racist ways no matter our intentions. Uprooting racism from our daily actions takes a lifetime of work.
The post is long, but it is a good read if you teach or are considering a career in education.