Voki is a Web 2.0 tool that enables users to express themselves on the web in their own voice using an avatar, a talking character (Voki 2008) which they can customise to their liking. I decided that Voki would be the ideal tool on which to base the three lessons that I chose to describe and evaluate in this paper because: it can be accessed both at home and at school; it necessitates computer-pupil interaction, which, as described above, is a motivating factor;  it facilitates the transition from teacher-centred, class-based learning  to one in which the pupil begins to acquire individual responsibility; it makes it possible for the quieter pupils to make their presence felt and be heard; and it allows the pupils to role-play and hide behind a mask (an avatar).