Having a clear idea of the knowledge in the heritage language that a student brings to the classroom is essential for a successful language-learning experience; for that reason, research in heritage language education has been focusing increasingly on assessment issues, especially language placement exams. Professionals debate whether assessment procedures should measure what students know and can do with the heritage language, or what deficiencies they have. Ideally, a balance of both will produce a better placement exam. This paper presents a working model of language placement based on current second-language theory and research and on what is known of heritage language learning. It explains the rationale for content selection and the design of effective tasks in a language placement exam for incoming university students and, finally, briefly voices some key logistical considerations. (Contains 6 notes and 1 figure.)