This report deals with cognitive research conducted on the Teacher Listing Form (TLF) of the Schools and Staffing Survey (SASS) of the National Center for Education Statistics. The SASS is a set of 10 self-administered questionnaires designed to provide information on all aspects of the school system. The TLF is the first of the 10 surveys, and is used to select teachers from schools to participate in the teacher questionnaire. In order for the TLF to obtain accurate information it is important that respondents follow lengthy instructions about the teachers who should be included or excluded from the survey. Twenty cognitive interviews were conducted in three waves. After the first and second waves, revisions to the form were made, and it was retested. In spite of the addition of color and design changes, respondents continued to have difficulty with the form after wave-one revision. The second round of revision resulted in improved instructions, fewer examples, and better navigational characteristics for the form. Some remaining wording issues and discussed, and moving to a larger page size is recommended. Twelve appendixes provide original and revised versions of the survey and instructions. (Contains two references.) (SLD)