Besides, interaction is an essential level for students to concern. By learning online, students communicate with instructors and classmates via e-mail, video conference and other computer-based chat. For example, a virtual system is an online training system. It provides the teacher-student interaction, instant feedback, and active participation with other students. Throughout the interaction with virtual system, students are able to share their experience and expand the view of others’ culture. However, once the course is over, students will speak their mother languages. Thus, it is hard for them to improve the speaking skill in the target language. When living and studying in the foreign country, students can interact with native speakers directly. The interaction and communication allows students to broaden their worldview and improve their speaking skills. Besides, studying abroad is the opportunity to allow students to participate in various experiences and develop new skills. For instance, in America, students often express their opinion in the class. Thus, it is a good practice for international students to share their thoughts and develop critical thinking. With this valuable experience, students can apply expression skills once they enter the workplace. As a result, studying abroad can accelerate one’s speaking ability and broaden the worldview.