We have a pretty diverse student body and have had very few problems related to race. Our approach, though, closely mirror that of this charter school, though we don’t focus so much on America being a melting pot was we do God being the Creator and Redeemer of the single, unified human race. Either it way it runs afoul of educational orthodoxy today.
https://www.joannejacobs.com/2021/11/melting-pot-charter-under-attack/
Sounds like the right plan to me on the spiritual level.
The issue is, of course, also sociological. There is a thing called a "tipping point," and it's somewhere around a third of the student populace. Of course that's inexact, but it's just a benchmark. The parent group that held sway (in our setting, usually Anglo) looks at who's enrolled, who their kid is with, and if they begin to feel outnumbered by the other group(s), there's a really strong desire to boogie. It's not unnatural. And if it's more than fifty-fifty, and if some of the incoming kids are academically disadvantaged, let's say, there can be an exodus, especially if there are presenting events ( fights, name-calling, drugs in the bathroom, etc., etc.).
Solutions include oceans of time bringing the parents together informally, food, sports events, etc., so there's commonality. And of course, sympatico top leadership who are all on the same page. And first and foremost, teaching unity in the bond of the Spirit. And that the school and church are/should represent the community in which they are located.
When my wife began our pre-school 500 years ago or so (she knew Luther personally), it was all white kids and mostly from the church (!). And so it went for the first three or four years. It was all tuition-based. And the first non-white parents were really dedicated people who made it easy for integration, with lots of those events. Then at a certain point, there were hardly any white kids left in the neighborhood, and the school looked and looks like where it's located now, 100% non-white with a 100% non-white faculty.
But from a supervisory perspective, we lost schools on Long Island that hit that tipping point and were pretty much evacuated by the kids and grandkids of the old guard.
Blessings on your school and church!
Dave Benke