The same law was passed last year in Mississippi, as well as Texas and Tennessee.
MORE: http://www.patheos.com/blogs/friendlyatheist/2014/01/29/now-virginia-is-attempting-to-legalize-prayer-during-morning-announcements-football-games-and-graduation/
See also...
Divided Virginia Senate passes student prayer bill
http://hamptonroads.com/2014/01/divided-virginia-senate-passes-student-prayer-bill