The third edition of the ecers is a major revision that introduces innovations in both the content and administration of the scale while retaining the continuity of the two principal characteristics of the ecers namely its comprehensive or global definition of quality and the reliance on observation as the primary source of information on which to base assessment of classroom quality. The third edition of the ecers is a major revision that introduces innovations in both the content and administration of the scale while retaining the continuity of the two principal characteristics of the ecers namely its comprehensive or global definition of quality and the reliance on observation as the primary source of information on which to base assessment of classroom quality. Ecers 3tm early childhood environment rating scaler 3rd ed a thorough revision of the ecers rtm designed to assess group programs for preschool kindergarten aged children from 3 through 5 years of age total scale consists of 35 items. Early childhood environment rating scale for preschool and kindergarten the long anticipated new version of the internationally recognized early childhood environment rating scale ecers 3 focuses on the full range of needs of preschool and kindergarten aged children