Alan H. Cron, who is taking over from Stephen Sangster as principal of Rockland High School, is soliciting input from the school community through an online survey, at www.surveymonkey.com/s/NQYXV65, and a series of meetings. In a letter on the high school website, Cron, a longtime administrator at Milton High School, unveiled an “entry plan” that includes meetings with faculty and staff, parents, and students. The student forums take place at the school Sept. 13 and 27. “Building trust that allows for an open exchange of ideas is important, so these meetings will be confidential,” he wrote. To read the letter, visit http://rocklandschools.org/.