England:
Department for Children, Schools and Families (DCSF)
The National Strategies
Ofsted
Governornet – Information for School Governors
 

Northern Ireland:
Early Learning DENI (Department for Education in Northern Ireland)

Scotland:
The Scottish Government
Learning and Teaching Scotland

Wales:
Welsh Education Department

UK early childhood organisations:
Family information services
National Children's Bureau
Centre for Excellence and Outcomes (C4EO)
Daycare Trust
National Childminding Association (NCMA)
National Day Nurseries Association (NDNA)
4Children (formerly Kids’ Clubs Network)
Council for Awards in Children’s Care and Education (CACHE)
Sightlines Initiative
Learning Through Landscapes
Peers Early Education Partnership (PEEP)
The National Childbirth Trust
Talk to your baby - National Literacy Trust
The Parenting Education and Support Forum
For Parents by Parents
Parenting Across Scotland (PAS)
Bullying Online - helping parents and pupils deal with school bullying
capt - child accident prevention trust
ChildLine
Nurture Group Network
Children in the picture - Scope
 

Other UK organisations:
Skills for Life: the national strategy for improving adult literacy and numeracy skills
Card Aid
National Extension College
 

Research:
Centre for Research in Early Childhood (CREC)
Institute of Education, London
The Effective Provision of Pre-School Education (EPPE)
DATEC

International organisations:
Childcare Exchange
Early Childhood Australia Inc. (ECA)
Early Learning Resource Unit (South Africa)
United Nations Educational, Scientific and Cultural Organization (UNESCO)
World Forum Foundation

Although these linked sites contain relevant information, Early Education cannot be held responsible for their content.