This article describes a project to apply and validate a conceptual framework of clusters of purposeful learning activity involving ICT tools. The framework, which is based in a socio-cultural perspective, is described as "DECK", and comprises the following major categories of the use of digital technologies to support learning: distributed thinking and knowing; engagement; community and communication; and knowledge building. Small-scale research to test the framework was carried out with 12 teachers in English primary and secondary schools. The methods involved mind mapping, "think aloud" procedures and interviews. The framework was modified in the light of teachers' responses and offers a way of describing and thinking about the diverse uses of digital technologies to support learning in various contexts. (Contains 2 tables, 4 figures and 2 notes.)