From 2005-2008 Mangere Bridge Kindergarten in New Zealand carried out a Centre of Innovation research project exploring the transition between early childhood education and school. A flexible action research approach was used, with the three teacher researchers, supported by two university research associates, developing and researching a range of strategies for supporting children’s learning as the children and their families ‘crossed the border’ from early childhood education to school. Many of these initiatives involved working closely with teachers in the local school setting. This paper focuses on one aspect of the findings, the ways in which the early childhood portfolios could be used to enhance children’s learning during the transition to school. Portfolios were identified as a belonging and empowerment tool; a means for school teachers to access to children’s funds of knowledge; playing a role in constructing a positive self-image about learning; and as valuable literacy artefacts.