(Thomas, Close, Donoghue, Squires, Bondi, & Piekarski, 2002)(Thomas, Close, Donoghue, Squires, Bondi, & Piekarski, 2002)Figure 10 AR Tennis Game(Henrysson, Billinghurst, & Ollila, 2005)141.3 Computer supported collaborative learning1.3.1 OverviewCollaborative learning has bee[r]