| BA | Bachelor’s degree |
| CARE | Curriculum and Quality Analysis and Impact Review of European Early Childhood Education and Care |
| CIS | Caregiver Interaction Scales |
| CLASS | Classroom Assessment Scoring System |
| EACEA | Education, Audio-visual and Culture Executive Agency |
| EC | European Commission |
| ECE | Early childhood education |
| ECEC | Early childhood education and care |
| ECERS | Early Childhood Education Rating Scale |
| ELLCO | Early Literacy and Language Classroom Observation |
| ERS | Environment Rating Scales |
| EU | European Union |
| Eurydice Network | Education Information Network in Europe |
| FCCERS | Family Child Care Environment Rating Scale |
| ISCED | International Standard Classification of Education, including ISCED 01 for programmes designed for children aged 0‑2 and ISCED 02 for programmes designed for children aged 3‑5 |
| ITERS | Infant and Toddler Environment Rating Scale |
| MDG | United Nations Millennium Development Goals |
| NICHD | National Institute of Child Health and Human Development |
| OECD | Organisation for Economic Co-operation and Development |
| ORCE | Observational Record of the Caregiving Environment |
| Pre-K | Pre-kindergarten |
| QRIS | Quality Monitoring and Rating Improvement Systems |
| SDG | United Nations Sustainable Development Goals |
| US | United States |
Engaging Young Children
Lessons from Research about Quality in Early Childhood Education and Care