Answer:
1a: This article is centered around the Gile County school district, where Narrow High School was in hot water after putting up a poster of the ten commandments from the bible which is a religious document. This caused a lot of controversy, cause it was seen as a certain religion was forced on students. The school faced a lawsuit that made them take the poster down. Even so the school board still tried to have it up, but now with the declaration of independence around it. They went to court again with more judges as they tried to come up with a logical solution.
1b: The First Amendment
1c: The First Amendment was involved because the Gile School District wanted to be allowed to put up religion based content in schools. Which the school and the opposing side think is against their first amendment right to freely exercise their religion. But the fact that it is in a public school changes things.
Sorry if any of this is wrong I tried my best, but anything is better than a zero.