The ECERS-R is an observation tool used to assess the quality of preschool classrooms. It contains 43 items organized into 7 subscales: Space and Furnishings, Personal Care Routines, Language and Reasoning, Activities, Interaction, Program Structure, and Parents and Staff. Proper administration of the ECERS-R involves observing classrooms and scoring items on a scale of 1 to 7 based on research-based quality benchmarks. Training and resources are available to ensure reliable implementation of this assessment.