Refresher course.

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Refresher course is a course that reviews and updates a topic for those who have not kept abreast of developments . It is a course of instruction , course of study , class - education imparted in a series of lessons or meetings , " he took a course in basket weaving " , " flirting is not unknown in college classes " . It is a course for reviewing material previously studied or updating information or skills . It is a short course related studies or trainings connected with one's professions .