A school district near Houston may tighten its policies on religious assemblies after an Islamic presentation angered many parents. Nearly 900 seventh- and eighth-graders at Friendswood Junior High last month attended an assembly on Islamic culture. The Council on American-Islamic Relations put on the presentation. Parents weren't notified beforehand, which was a violation of school policy. Since then, some parents, talk radio hosts and Christian clergy have criticized the presentation.The school board is scheduled to vote next month on a policy change that would only allow teachers to address religious topics in the future. The Islamic assembly came after a Muslim student was stuffed into a trash can at school.