Book excerpt: SAVE when you order the ELLCO Pre-K User's Guide and ELLCO Pre-K Tool together! The Early Language and Literacy Classroom Observation Tool (ELLCO) comes in a package of 5 and is part of ELLCO, the bestselling classroom observation tool that helps schools assess the quality of literacy practices and supports and give children the best possible start in language and literacy development. Trusted by schools across the country, ELLCO helps educators reliably gather the data needed for professional development and program improvement, leading to better literacy outcomes for young children. Learn more about ELLCO Pre-K and ELLCO Kâe"3. See which domain of school readiness in the Head Start Child Development and Early Learning Framework this tool addresses.