(Brianna Soukup/Staff Photographer)High school students across southern Maine and in Lewiston are planning to walk out of class or skip school altogether to participate in a national general strike Friday over U.S. Immigration and Customs Enforcement actions in Maine and elsewhere. A social media post announcing the change said it was made so students can more easily attend a protest scheduled for Friday afternoon in Monument Square. In order to support the team, a demonstration will instead be held after the assembly, organizers said on social media Thursday morning. “Students will participate in the nationwide strike in solidarity with Minneapolis, Maine’s immigrant community, and AGAINST ICE,” a social media post announcing Yarmouth’s participation states. Ararat and Morse high school students will leave school at noon and meet at the Sagadahoc Bridge.