“…After all, it is acceptance and effectiveness that decide on using a tool in the classroom. -arouse interest, motivation (Jorde et al, 2003;CTG at Vanderbilt, 1993, 1997 -focus attention (Hmelo & Day, 1999) -construct joint problem space (Cohen, 1995;Scardamalia, 2002Scardamalia, , 2004 -enable progressive questioning (Rahikainen et al, 2001) hypothesis generation (Miller et al, 1993;Webb, 1994) -everyday objects facilitate first modelling steps (Avouris et al, 2003;Papadimitriou et al, 2006;Metcalf et al, 2000) -graphical modelling makes abstract concepts accessible (Miller et al, 1993;Niedderer et al, 1991) -mapping helps construct and retrieve integrated knowledge (Novak, 1990) -content-specific support is needed (Li et al, 2006;Manlove et al, 2007) -enable flexible sharing of learning objects (Rubens et al, 2005) -provide overview of work results for students and teacher (Jorde et al, 2003;Slotta, 2004) -deepen and extend understanding (Mork, 2005;Slotta, 2004;Tabak et al, 1999) -prompts for reflection are needed (White & Frederiksen, 1998) -unbiased communication (Gobert & Tinker, 2004) -logging and assessment (Jorde et al, 2003) -structured and reflective knowledge building (Scardamalia, 2002(Scardamalia, , 2004Veermans & Cesareni, 2005;Kollar et al, 2007) -progressive inquiry (Rahikainen et al, 2001) -benefits of graphical/structural representation of concepts (Suthers et al, 2008;Cañas et al 2003) Figure 4: Evaluative activities in the WISE project on airbags. Activity ...…”