This document, which is intended to serve as a guide for work force preparation program providers, details the Illinois occupational skill standards for programs preparing students for employment in occupations in the in-store retailing cluster. The document begins with a brief overview of the Illinois perspective on occupational skill standards and credentialing, the Illinois Occupational Skill Standards and Credentialing Council (IOSSCC) requirements for occupational skill standards, the process used to develop the skill standards, and assumptions underlying the standards. Presented next are skill standards for 69 tasks typically performed by individuals in in-store retailing occupations. Each skill standard statement contains the following components: (1) the actual skill standard (including the conditions of performance, work to be performed, and performance criteria); (2) performance elements; and (3) performance assessment criteria. The following are among the categories of tasks for which skill standards are provided: provide customer service; sell products and services; implement merchandising plans; maintain the store/department's appearance; monitor inventory; protect company assets; work as part of a team; and perform supervisory functions. The following items are appended: a glossary; lists of IOSSCC, Marketing and Retail Subcouncil, and In-store Retailing Cluster Standards Development Committee members; and a list of necessary workplace skills. (MN)