Justice Stevens Court Case

Wallace v Jaffree
http://caselaw.lp.findlaw.com/cgi-bin/getcase.pl?court=us&vol=472&invol=38
http://www.oyez.org/cases/1980-1989/1984/1984_83_812

Facts
1. Took place in Alabama
2. Argued December 4, 1984
3. Decided June 4, 1985
4. Jaffree challenged the constitutionality of a 1-minute period of silence in all public schools "for meditation or voluntary prayer."
5. The District Court said that the Establishment Clause of the First Amendment does not prohibit a State from establishing a religion which allows the schools for provide this time
6. However, the supreme court voted: 6 votes for Jaffree, 3 votes against (saying that the moment of silence does not show neutrality of religion)

Question
1. Why did Jaffree challenge this?
2. Was the case related to the Constitution the only reason it made it to the federal court?
3. Why would the District Court say the amendment didn't relate to the States?
4. What were the reasons 3 justices voted against Jaffree?