sentences:  Schooldigger.com ranked the school tied for 97th out of 381 public high schools statewide in its 2011 rankings (an increase of 73 positions from the 2010 ranking) which were based on the combined percentage of students classified as proficient or above proficient on the mathematics (85.8%) and language arts literacy (97.6%) components of the High School Proficiency Assessment (HSPA).The Hackettstown High School Tigers joined the Northwest Jersey Athletic Conference in the 2009-10 school year, as a result of the realignment of conferences in Northern New Jersey by the New Jersey State Interscholastic Athletic Association (NJSIAA).With 710 students in grades 10-12, the school was classified by the NJSIAA for the 2015-16 school year as North II, Group II for most athletic competition purposes, which included schools with an enrollment of 508 to 770 students in that grade range.