The use of public school facilities for religious meetings during instructional time raises important legal and ethical questions, primarily related to the Establishment Clause of the First Amendment, which prohibits the government from establishing an official religion or unduly favoring one religion over another.
In many cases, courts have evaluated whether it's permissible for public schools to allow the use of their facilities for religious gatherings. Typically, the key factor is whether these arrangements are consistent with the principles of neutrality toward religion. If a school allows community groups to use its facilities after school hours, this is often acceptable, whether those groups are religious or secular. However, permitting religious meetings during instructional time could be contentious and might be seen as government endorsement of religion.
To minimize legal challenges, schools may adopt policies that ensure equal access to facilities for all groups, religious or non-religious, and maintain strict separation between school-sponsored activities and religious practices.
If you're concerned or interested in a specific case or context regarding this issue, please provide more details for further clarification.