This is true basically across the board, which is why we had the reform of Chapter 222 to begin with, if you recall.
Across the state, black students are more than three times more likely than their white classmates to be suspended or expelled. Hispanic students are suspended and expelled at more than twice the rate of white pupils. While increases in suspension rates were small last year, they most heavily impacted minority students, economically disadvantaged students and students with disabilities.
Plus, as noted by MassLive:
Of the top 20 school districts to give out-of-school suspensions during the 2014-2015 school year, charters represented 90 percent.Charter schools also gave out 8% of suspensions statewide to the 4% of kids under their care.