PreK. This newly revised three-part observation record toolkit assesses environmental factors in early literacy and language development and helps administrators, principals, supervisors, program directors, and teachers gather important information needed for improving classroom quality, building appropriate literacy programs, and assisting in teacher development. The ELLCO is valid and reliable and is a perfect tool for Reading First and other literacy grants. With this new edition of the assessment tool thousands trust, preschools will have the information they need to determine the effectiveness of their classroom environments, strengthen the quality of their programs and teaching practices, and improve young children's early literacy outcomes. 44 pages. Package of 5.