对于双语能力和通过交谈来学习外语，以及语言掌握能力的分析能够帮助应用语言学的研究人员拓展与语言学习相关的理论。 而这些信息则能够进一步用来塑造语言政策，以及更有效地教导学生。

Courses are academic classes taught by qualified instructors that are intended to enhance participant’s knowledge of a given area or training in a particular discipline. Courses vary broadly in terms of length, size, content and duration.