The South Dakota House passed the bill and sent it to the Senate, but not before the House's only out member, Kameron Nelson, spoke passionately against it.
The teacher gave a letter to several high school students, referring to them by their deadnames and saying their gender assigned at birth was "the biological truth."
Noem issued trans-exclusionary executive orders after vetoing earlier legislation, and she says her new bill will avoid the problems of the previous one.
Gov. Kristi Noem's action comes after she sought changes to anti-trans legislation, drawing criticism from the right, and some now say she's trying to save face with conservatives.
Kristi Noem wants an anti-trans bill before her to exclude trans athetes only at the high school level, not college, but she's announced a coalition to resist sanctions for such policies.