许多人试图学习外语，因为他们缺乏正确的语言习得方法。语言教学研究有助于学生理解正确语言学习的指导性方法，以帮助他人获得第二语言。

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.