Many states use the Child Outcomes Summary (COS) process to collect child outcomes data for federal reporting purposes. These documents explain how the information produced from the COS process can be used to classify a child into one of the 5 reporting categories that make up the OSEP reporting requirement on child outcomes. This online interactive explains how data obtained from the COS process is converted to the child outcomes data that states report annually to the federal government. A set of calculators is included to allow users to explore how the data are converted.