The majority of Latin American immigrant students in ESEA Title VII Spanish/English programs that have been evaluated seem to suffer from inexperience in taking tests like the Comprehensive Tests of Basic Skills (CTBS). This study was designed to assess test familiarity, language of the test, and literacy, and to examine whether certain alterations in the testing procedure might allow for better estimation of students' ability and program benefits. Limited English proficiency students in grades four, six, and eight participated in the study. Instruments used were the English and Spanish versions of the CTBS. Testwiseness training was developed and administered to half the groups. An oral administration procedure for students with limited native language literacy skills as well as limited English proficiency was also developed. A sociolinguistic analysis and a psychometric analysis of the tests were developed and testwiseness materials were designed. The history of the development of the procedures, as well as the tryouts and revisions, a description of the teacher training, and a detailed analysis of the testing data comprise the greater part of the report. Attached to the study is the English version of a teacher's manual for training in testwiseness, a program adapted for use with the CTBS. (AMH)