Penncrest High School is a public four-year comprehensive high school in Middletown Township, Delaware County, Pennsylvania, United States. It is the high school for the Rose Tree Media School District and is accredited by the Middle States Association of Colleges and Schools. The school offers more than 200 courses and 17 AP programs. Penncrest students score in the top 25 percent of the state on the PSSA.The high school boasts a 100% graduation rate, with more than 90% of the students continuing with higher education pursuits. The class of 2009 included 15 students who were recognized by the National Merit Scholarship Corporation, with three attaining winner status. The former principal, Mr.