The Teacher Performance Assessment Instruments (TPAI) were designed to determine how well teachers can demonstrate certain minimum teaching skills considered essential to effective teaching. This manual is designed for use by data collectors and others during training on the administration of the TPAI instruments. It may also be used as a reference during an actual assessment. Contained within are the five instruments which comprise the TPAI, a commentary on three of these instruments, and a summary of procedures for managing data collected during an assessment. (JD)