This workbook is for admissions officers who are interested in using a combination of objective test scores and high school grades to forecast an applicant's capacity for freshman academic work. It is intended as a nontechnical guide suitable for readers without any statistical training. It presents the procedures and computations necessary to develop a prediction equation that can be used in estimating a student's probable freshman grade average. An oversimplified description of the mathematics involved would be: Given a particular set of objective admissions information, what is the AVERAGE freshman performance of those students who had identical sets of admissions information? In practice, colleges have few entrants with identical records. It is necessary, therefore, to use a set of mathematical calculations from which an equation can be derived that "stabilizes" the variety and range of grades and test scores. Information is provided on selecting the group of student records from which the prediction equation will be derived, and on special problems that may occur. A complete example based on the Fordham University Class of 1961 is provided. It is emphasized that while statistical predictions should result in greater efficiency, they do not, and should not, represent the basis for the final admissions decision. (DS)