In education business, proper interaction is a crucial factor for learning effectiveness. However, it is difficult to successfully guide the participants to achieve the appropriate interaction in an online learning environment. That is, the interaction as well as internal dialogue should be systemically performed under a valid control. In this paper, the concept of knowledge sharing is applied to achieve the appropriate interaction among participants in an online learning environment. By evaluating and integrating the differences between interaction considerations and knowledge sharing, the proposed methodology transforms the interactions into knowledge flows to easily apply the concept of knowledge sharing. Then, the corresponding activities can be acquired following the conformable analysis. According to experimental results, the learners assigned with interaction supported by knowledge sharing flows have better success in terms of learning effectiveness. That is, the concept of knowledge sharing significantly influences the interaction throughout the use of a learning platform and is a way to enhance the learning effectiveness. (Contains 4 figures and 5 tables.)