Talk:Mikami-Sensei/@comment-24611904-20140730222459/@comment-397235-20140801004741

See, I never saw them not telling their families about the curse as an attempt to keep it confined to class 3-3 (I mean, it's obvious the rest of the school knows something's up; we learn that in the very first scene in all adaptions except the film).

The reason 3-3 has PE separate is for the more practical two fold explanation: 1, PE is potentially dangerous anyway, and 2, the shunning is traumatic enough if it's just your class, so letting the rest of school off the hook gives the nonexistent student some measure of relief (unless you're Yuuya, who uses his position to subvert the Art Club into leaving Mei in one of the most dickish acts of the series no one really seems to care about).