“…Dorian de Haan (2012) has produced evidence that identifies the processes of young children's communicative learning taking place in a play-based curriculum. Similarly, van Oers and his colleagues have carried out several studies in order to find evidence for the effectiveness of DE that have identified many positive outcomes (see van Oers 2003, 2007, 2010a, 2010b, Peters and van Oers 2007 Terwel 2007, van Oers, andDuijkers 2012).…”