Five Naval Academy course standings have been evaluated for their effectiveness in adding to the prediction of quality-point ratios at the Naval Postgraduate School obtainable from the experimental tests developed for the School by the Educational Testing Service. Five groups of students were included in the study: first-year students tested in 1948, second-year students tested in 1948, first-year students tested in 1949, second-year students tested in 1949, and first-year students tested in 1950. For every one of the groups, the course standings added to the effectiveness of the tests alone, raising the multiple correlation by at least several points. In four out of five groups, the course standing found to be the one to make this added contribution to validity was that in Marine Engineering. It was recommended that in choosing students for admission to the School, the course standing in Marine Engineering be given equal relative weight to that given to the score on the selection test.