This monograph is designed to acquaint classroom teachers with the language proficiency guidelines of the American Council on the Teaching of Foreign Languages (ACTFL) and the oral testing guidelines of the Educational Testing Service (ETS). The guidelines are intended for language proficiency assessment by the oral interview technique. Designated pages are to be used as a pull-out manual before and after testing for illustrating how informal oral language proficiency assessment (OLPA) interviews are conducted. An introductory section discusses the need for OLPA, the interview technique, the history of oral language proficiency testing, terms and definitions, and caveats and common concerns. Three subsequent chapters examine proficiency levels (the rating scale and components of proficiency levels, and the ACTFL generic speaking descriptions), interviewing (techniques and procedures, interviewer bias and mistakes, and checklists, formats, and other suggestions), and student variables (ages and developmental stages, cultural and environmental factors, and personal and affective characteristics). The ACTFL proficiency guidelines, additional test descriptions, and a brief reference list are appended. (MSE)