You talking about Blackshear Elementary, fam, on Holman St.?I actually agree and I think black teachers are going to be more empathetic and understanding towards black kids while white teachers are going to assume the worst of a black student if they aren't a perfect angel. Even then that is not enough.
Though to be honest, in my case in elementary school, almost all of my teachers were black and the dysfunction was still there at my school. The teacher who had the globe thrown at his head and left bleeding everywhere and quit was black. I honestly couldn't remember having a white teacher in elementary school. Any of my Houston folks familiar with the 3rd ward area, I can't remember the elementary school name but it was in that area. All the schools in that area were pretty bad when I was coming up with Yates High School being the most notorious. Kids were getting killed near or close to school grounds in gang shootings often. Don't know if that area is still the same or if it changed. That was 20+ years ago I was there.
My pops and aunts went to Jack Yates and graduated in the beginning of the 80s and it was bad. It looks VERY different now that U of H gentrified the immediate area. Looks nice but I couldn't tell you if it's doing better academically but I don't think it's as dangerous as it used to be, but that's all assumption.