My experience here in Toronto is just let kids grow up together in school and the biases will eventually melt away. As much as they can anyway. I know that for my kids they never really thought of the kids around them as "others" until the schools started pumping racial grievance SJW type rhetoric into them all the time. My daughter told me how she never felt different from the other kids until the teacher told her that she is "marginalized" and made her write and draw something to show how systemic racism has held her down. When she said she didn't feel that way and didn't know what to draw, the teacher just told her to draw something like herself pushing a boulder up a hill so that's what she did. Everything I've read about the "unconcious/implicit bias" training programs that are out there for schools and corporations says that the training doesn't actually work, the science just isn't there. It's just another thing that government departments and corporations are gonna do to cover their asses. It puts money into the right pockets anyway, into the Diversity Industrial Complex.