In the discussion of research experience on the quality of early childhood educational services, this article documents the first two phases of a longitudinal study funded by United Kingdom Department of Education. The Effective provision of pre-school and primary 1997-2008 is the largest European study on the effectiveness of preschool education. The article describes its aims, the sample, methodology and key findings over the preschool period. It goes on to emphasize the importance of 'quality' in child care settings and how good quality is essential for the enduring benefits of pre-school up to age 11
longitudinal studies; preschool education; teaching quality; learning evaluation
