Tex. Educ. Code § 25.154
Students may organize prayer groups, religious clubs, "see you at the pole" gatherings, or other religious gatherings before, during, and after school to the same extent that students are permitted to organize other noncurricular student activities and groups. Religious groups must be given the same access to school facilities for assembling as is given to other noncurricular groups without discrimination based on the religious content of the students' expression. If student groups that meet for nonreligious activities are permitted to advertise or announce meetings of the groups, the school district may not discriminate against groups that meet for prayer or other religious speech. A school district may disclaim school sponsorship of noncurricular groups and events in a manner that neither favors nor disfavors groups that meet to engage in prayer or religious speech.
Tex. Educ. Code § 25.154