Keys to Excellence Keys to Excellence Best Practices Document SNA's Keys to Excellence Best Practices Document is an initiative designed to assist schools achieve nutrition integrity goals at the administrative, management, and operational levels. This document and its standards of practice and indicators, defines national standards for quality programs and provides a framework for continuous program review, evaluation, and improvement.Questions? Email email@example.com or call (301) 686-3100. Online Tool: SNA discontinued the Keys to Excellence online benchmarking platform on April 30, 2016. We encourage you to download the Keys to Excellence Best Practices Document to help provide a framework for continuous school nutrition program review, evaluation and improvement.