My middle son was recruited to a "magnet school" offering marine biology as a "sweetener". We had to deliver him to the bus stop at 5:30 AM and he didn't get dropped off until 5:30 PM. The school was located in a minority neighborhood with 90% black and hispanic students.
After a couple months, my son was very disappointed. The reward for doing well in class was getting beaten up on the playground. There is no virtue in being the top fly on the manure pile. On closer examination, the "marine biology" magnet was happening for 30 minutes on alternate Thursdays. What a farce. It was a babysitting/feeding operation masquerading as a school. One afternoon a shooting occurred two blocks from the school. Enough. We removed my son from that circus.
Upon returning to our local neighborhood school, my son discovered he was WEEKS behind the standard syllabus for his grade. He pressed hard and caught up in 2 weeks. Even the neighborhood school was substandard by my measure, so I set about doing extra tutoring and correcting the abysmally "corrected" papers returned by his "teacher". By the time he graduated from high school, he had multiple AP classes completed (and tutored his fellow students), a 4.33 GPA and reasonable fluency in Spanish.
With that as background, I have a very poor view of forced integration. It's instant culture clash and often introduces a disruptive element the destroys the value of the education in a classroom. There is no such thing as improving academic results by osmosis. It takes actual effort. When the students in a classroom have not been screened to ensure readiness at a minimum standard, those who aren't ready get screwed and left behind OR everyone else in the room gets screwed when the pace of the class slows to the poorest performer.
bttt