Student in New Mexico has organized a nationwide walkout supporting the 2nd amendment. Map link on their website actually has some Maryland schools participating.
Washington Times article: https://www.washingtontimes.com/news/2018/apr/29/will-riley-launches-stand-second-student-walkout-s/
Walkout website: https://standforthesecond.com/
Washington Times article: https://www.washingtontimes.com/news/2018/apr/29/will-riley-launches-stand-second-student-walkout-s/
Walkout website: https://standforthesecond.com/