This module is one in a series of four performance-based modules developed to prepare vocational educators to serve limited English proficient (LEP) students. It discusses the intake process and the purpose and importance of assessing LEP students for both English and native language proficiency and vocational interest and aptitude. The module is made up of a series of three learning experiences, some providing background information, some providing practice experiences, and others combining these two functions. An introduction lists terminal and enabling objectives, resources, learning experiences, and optional reading. This module provides information on: (1) appropriate standardized English proficiency assessment instruments; (2) administration and use of three informal English proficiency techniques; (3) adaptation of these techniques for assessment of native language ability; (4) assessment of vocational interest and aptitude and adaptation of assessment strategies for use with LEP students; and (5) interpretation of assessment results. The final learning experience requires the teacher to demonstrate the skill in an actual vocational instructional situation where the teacher is an intern, student teacher, or inservice teacher. An assessment form for the final learning experience is included. (YLB)