The purpose of this study was to review and evaluate the Basic Inventory of Natural Language (BINL) to help determine whether it should continue to be used in Honolulu's Students of Limited English Proficiency (SLEP) Program. The study looked at four critical aspects of the BINL: its content validity, its test-retest reliability, its effectiveness as a measure for exiting project students in terms of the students' post-SLEP performance in the regular classroom, and the satisfaction of the project staff with its use. All the BINL test items related to some of the SLEP instructional objectives, but not all of the SLEP objectives are measured by BINL items. The test-retest correlation in terms of BINL raw scores was .88. On the average, the exited students appeared to be doing more than satisfactorily in the regular classroom in all subject areas. The test use survey indicated that there was a high degree of support and enthusiasm on the part of the SLEP Program staff for the use of the BINL. (BW)