This document, third in a series of 11 subvolumes of a handbook prepared to provide training for educational research and development personnel in the development of instructional materials, deals with the task of sequencing and grouping criterion behaviors. Document content is arranged according to the steps involved in performing the task. This task includes three steps: (a) sequence task analysis results for all the subcriterion behaviors that make up each criterion behavior; (b) sequence task analysis results for all criterion behaviors that make up an instructional program; and (c) create instructional units. More specific substeps are included for performing the three steps. Background information includes a matrix presentation of the purposes of sequencing and the concerns of sequencing decisions. (PD)