Because every student has the right to go about their own business without being harassed by someone else ! Nobody has the right to ridicule another person just because they are 'different' in some...
It would be legal, I think, if a student and teacher marry each other after the student is no longer a real "student" of that school or any school. However, you'd have to have the student's agreement...
Typically no they can not. Student teachers are those pursuing a bachelor's degree in an education program. Student teaching is part of their coursework which typically occurs within their senior...
To sue because another student attacked you and the teacher did nothing, get a lawyer and take them to court. Say that the student attacked you and the teacher did nothing.