I live in a multicultural area of a large city, but worked in a one-culture suburb. There is little work needed on the topic in the city. My daughter-in-law, a teacher, tells me of her class ... 3 Sikhs, 2 Hindus, 3 Chinese or Vietnamese, a Somali, 4 Middle Eastern Muslims, etc. There is little need to teach anything because the kids figure it out for themselves. Race and religion soon become irrelevant as it's who likes to play soccer, or discuss the latest video game fad. That's what's important.
But out there in the suburb where the kids had no first hand experience, ignorance abounded. One parent asked me In poorly disguised racial overtones, "How can you stand living in THAT place?" (I'm white, and silent about it, so he had no way or recognising I was a Hindu)
So the more interrelating we can do, the better.