A guide for college administrators who are responsible for loan collection in the repayment of National Direct Student Loans (NDSL) is presented. Attention is focused on the difficulties created by loans with different terms and conditions. Repayment terms are discussed, and formulas are presented that are necessary to calculate the number and amount of payments and dollar cost of the loan to the student. After tracing the legislative history of the NDSL program as it relates to repayment, the minimum repayment requirements are reviewed. Regulations pertaining to National Defense Student Loans and NDSL are explained, and the text of the relevant NDSL regulations are appended. Descriptions are included on how to establish the length of the repayment period and the payment size as well as how to compute the required disclosure information. Both 10-year repayment periods and less than 10-year repayment periods are discussed. Billing procedures are also covered. Through the use of tables, an administrator will be able to calculate the following quickly: the number of payments required; the amount of interest to be paid; and the size of each payment necessary to retire all loans in the minimum time allowed. (SW)