From lowest socioeconomic status to highest, the categories are A, B, CD, DE, FG, GH, I and J.
In 1970, the Somerville district determined that rising enrollments meant that it would no longer be able to include students from Branchburg and set 1975 as the end date for the sending relationship.
Branchburg started the process of acquiring a 76-acre (31 ha) site for its own high school that could accommodate up to 950 students.
Branchburg filed a petition in 1975 with the New Jersey Department of Education seeking to terminate the send/receive agreement.
[8] Based on a report by the hearing examiner released in 1977, Commissioner of Education Fred G. Burke issued a 1978 decision that the petition be rejected based on the ability of Somerville to serve students from Branchburg with a quality high school education, the financial impact of higher per-pupil costs to both municipalities and the creation of greater racial imbalance in the Somerville district.