Tuition means studying a subject thoroughly. It can be broadly told as mastering a subject. Tuition is helpful till primary education where student find difficulty in any one or two subjects.
But Coaching is study of all the subjects under one roof. This term was initially adopted for exams like UPSC, CAT, CDS etc where knowledge of everything on or off is required which is not possible to gather all alone.
Later with high competition at all levels starting with std one to score at max 100 %, tuition has been gradually replaced by Coaching
Coaching means where the number of students studies together in a batch and A tuition is some different where a teacher teaches a single student or 2 - 3 students at a time.
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