Pot and prescription drugs are on the upswing and cocaine use is down, according to the recently released state Department of Education report on violence, vandalism and weapons. All incidents of substance abuse in NJ public schools are also included. The report shows a 168 percent rise in marijuana incidents between 2006 and 2009, with 1,977 incidents reported in the 2008-2009 school year. Another 238 incidents involved prescriptions drugs, an 89 percent jump from the 2006-2007 school year. On the flip side, problems with cocaine seem to be decreasing. There were 45 incidents involving cocaine in 2008-2009, a 60 percent decrease over the past three years. Alcohol, the second most popular drug — with 507 reported incidents — seems to be relatively flat, with an 11 percent increase over 2006-2007.