sentences:  Students again staged a walkout over a number of their concerns that they believed were not being taken seriously by the district administration, such as overcrowding and safety issues.Cohen's replacement, Larry Ashley, resigned three months into the school year, citing health problems.Later that month, the district sought to fire tenured art teacher Peter Panse, who had offered his senior students a nude figure drawing class taught off-campus as a way to improve their portfolios and chances for scholarships at art schools.