A sample of slightly over 1,500 students from even-numbered grades in public schools of the U.S. Virgin Islands were given the 1973 edition of the Stanford Achievement Test (in grades 2, 4, 6, and 8) and the Test of Academic Skills (grades 10 and 12) in an attempt to assess student academic achievement in the basic skill areas of mathematics, reading, and English Language. This report describes the data analysis which involved a detailed item analysis of each item on each test given to the sample of students in grades 8, 10, and 12 as well as a summary of student skills based on their achievement along objectives provided by the test publisher and keyed to individual test items. Measures of item difficulty and item discrimination were calculated for the entire territorial school system and for the individual school districts. (Author)