SHIRLEY - Suffolk high school students gave a river a complete examination today. Students have turned Southaven Park into an extended classroom as part of "A Day in the Life of the Carmans River 2012." Through the program, students and teachers from four school districts within the Central Pine Barrens region are exploring the 10-mile river to determine its health. Melissa Griffiths, of the Central Pine Barrens Commission, says the program is a collaboration between the Central Pine Barrens, Brookhaven National Lab and the state Department of Environmental Conservation. More than 200 students were involved in today's study.