“…(3) The support offered was targeted at pupils who had an identified problem in basic attainments, either early literacy skills (Grek, Mathes, and Torgesen 2003;Miller 2003;Savage, Carless, and Stuart 2003;Carless 2005, 2008;O'Shaughnessy and Swanson 2000;Wang and Algozzine 2008;Vadasy, Sanders, and Peyton 2006;Vadasy, Sanders, and Tudor 2007), literacy and numeracy (Welch et al 1995), numeracy (Muijs and Reynolds 2003) or a more general language delay (Boyle et al 2007). (4) The size of intervention and comparison/control groups varied from 15 (O'Shaughnessy and Swanson 2000) to approximately 180 (Muijs and Reynolds 2003) with the majority ranging from 17 to 33 in each group.…”