The NASUWT said verbal and physical abuse of teachers is going unchallenged too commonly.
The youngest pupils are expected to be back in class from February 22.
EIS said it was concerned about the group 'naming and shaming' individual schools and teachers.
EIS said members were alarmed and distressed but UsForThem denies the claims.
Educators remain optimistic that parents, staff and pupils will bounce back from the new coronavirus lockdown.
Schools will switch to remote learning for most pupils until February 1 as new coronavirus measures come into effect.
Everyone wants children to go back to school safely but there is no single view on how to do that.
The initiative aims to bring registered teachers back into the profession.
More than eight in ten Scottish education staff are worried about schools returning, survey finds.