Given the significance of teaching practicum in pre-service English teacher program, the purpose of this study was to explore the instruction method during the teaching practicum by analyzing the pre-service English teachers’ practice and their perception using discussion in web-based learning community. Five pre-service English teachers were asked to discuss the topic of ‘strategies for learning motivation’ on the web blog constructed for this study during the four weeks teaching practicum period, and to participate in a group interview after the period. The collected discourse data from the community discussion were then analyzed both qualitatively and quantitatively (frequency analysis), and the data from the interview were analyzed qualitatively. The results indicated that in the web-based learning community, pre-service English teachers ‘suggested teaching methods’, ‘reflected teaching methods’, ‘gave affective feedback’, ‘reported teaching methods’, and ‘asked questions and opinions’. In other words, they cooperated as a community by sharing their observation or the content of the lesson, asking for their peers’ opinions, and suggesting their own ideas and trying to enhance their teaching ability during the practicum. As for their perceptions on the activity, the pre-service teachers expressed that the web-based community task felt demanding at first, but they found it useful in that it led themselves to observe, reflect, and teach the classes with a sincere attitude and allowed them to feel connected to and supported by their peers during the period. Given these results, it was concluded that a web-based learning community can be exploited as one of the instruction methods for the teaching practicum and suggested the need to more related research in the future.