Yeah, no. That was never the intent of 1A. Individuals, or groups, are more than welcome to pray in government buildings, as long as they aren’t forcing that religious expression on unwilling people, using it as a religious test, or something similar that would amount to the establishment of a state-sponsored religion.

Students can pray in schools; teachers can pray in schools. Teachers can not compel students to participate in prayers, nor are teachers supposed to lead students in prayer (as that’s implied compulsion).