Communication skills are now emphasized not only in academia but also in other work places.
Teaching is an excellent opportunity to improve communication skills.
A TA performs 20 hours of teaching duties for undergraduate or occasionally beginning graduate courses. The specific duties vary from course to course, but the minimum involves four hours of combined recitation sessions and office hours. A significant amount of time for the TA's is spent in preparing the course material, either by attending the lectures or by reading the textbook and handouts, before doing the recitation sessions and holding office hours. In addition, TA's may be asked to grade homeworks and exams. For some courses, TA's will be assigned a grader to help grade homeworks.