Social annotation is an effective tool to cultivate learners' literacy skills. Besides the learners themselves, their peers and teachers are also involved in the annotating process. To facilitate effective interactions among the different types of subjects, we redesigned the social annotation activity into a four-step learning mode and developed a collaborative reading system to support this learning mode. In this system, learners can not only annotate on specific content but also interact with their peers to exchange ideas. Specifically, befor...
