Results from Key Stage 1 are described in most detail in the book by Peter Blatchford (2003) The Class Size Debate: Is Small Better? Maidenhead: Open University Press.

Key findings from the project can be seen by selecting the following links:

• Reception and Key Stage 1 (ages 4-7)
• Key Stage 2 (ages 7-11)

Findings from Key Stage 1 are also summarised in a DfES research brief which can be viewed in either PDF or Word format.