This is unacceptable. Any school that uses PUBLIC MONEY should not be allowed to discriminate. When TEACHERS fail to teach students, those teachers should be held accountable. The students should not be thrown out of the school when the school fails to teach.
The story below details one charter school network that uses "high standards" as an excuse to expel 'problem students'.
From Here and Now:
We’ve been hearing about the push by civil rights groups and the Obama Administration to end so-called “zero tolerance” discipline policies in schools, which suspend and expel students for often minor infractions.