“…Over the past 25 years, much research has been devoted to the effects of collaborative learning -or more specifically, peer-assisted learning (PAL) -on the social, behavioural, affective and cognitive development of the learner (O' Donnell and King, 1999;Topping and Ehly, 1998). The literature indicates that PAL positively affects children's performance in such academic areas as: achievement (Allen and Feldman, 1976;Cohen, 1986;Cohen et al, 1982;Fantuzzo et al, 1992;Green, 1991;Griffin and Griffin, 1997;O' Donnell and King, 1999;Topping, 1998); attitude towards learning (Ellis and Rogoff, 1982;Green, 1991;King, 1997;Lepper et al, 1990) and social and behavioural skills (Johnson et al, 1986;McAuliffe, 1994;Vincent et al, 1996). These findings resulted from a variety of PAL or peer-collaborative methods (Brown et al, 1996;Damon and Phelps, 1989;DeVries and Slavin, 1978;Griffin and Griffin, 1997;Rogoff, 1990Rogoff, , 1994Sharan, 1980;Slavin, 1978;Tudge, 1996) and involved comparisons of students displaying different demographic traits and a variety of cognitive and ability levels (Allen and Feldman, 1973;Brush, 1996;Fuchs et al, 1998;Radziszewska and Rogoff, 1991;Rogoff, 1994;Tudge, 1992;Utay and Utay, 1997).…”