GOV.UK is the main source for links to all government departments.
Department for Education - is the main source of resources relating to education and teaching. This was formerly called the Department for Children, Schools and Families
Older government publications will be stored under The National Web Archive
The Digital Education Resources Archive (DERA) from the Institute of Education is a digital archive of all documents published electronically by the Government and other relevant bodies in education, training, children and families.