High Quality Content by WIKIPEDIA articles! Northern Highlands Regional High School (NHRHS) is a regional public high school and school district in Allendale, Bergen County, New Jersey, United States. The high school serves students in grades 9 12 from Allendale, Ho-Ho-Kus, Saddle River, and Upper Saddle River. As of the 2007-08 school year, the district's one school had an enrollment of 1,274 students and 110.5 classroom teachers (on an FTE basis), for a student teacher ratio of 11.5. The district is classified by the New Jersey Department of Education as being in District Factor Group "I", the second highest of eight groupings. District Factor Groups organize districts statewide to allow comparison by common socioeconomic characteristics of the local districts. From lowest socioeconomic status to highest, the categories are A, B, CD, DE, FG, GH, I and J.