Chennai's work follows its corridors — the OMR stretch and Velachery on one axis, Anna Nagar and Adyar closer in, Tambaram and the southern suburbs strung along the rail line. Tutors who use the suburban trains cover far more of that than tutors on two wheels, and the monsoon weeks are worth planning for, since an evening of rain can cancel a week of home visits and that is when families who would not consider online in June agree to it. Senior-school requirements here often sit alongside an entrance-coaching batch, where what the student wants is problem-solving time rather than the syllabus taught again.
The board shapes the work more than the subject does. State-board homes following the Samacheer Kalvi syllabus, some of them Tamil-medium, usually want the textbook covered closely and the paper practised, because engineering admission in Tamil Nadu is settled on Class 12 marks rather than a separate state entrance exam — which loads a great deal onto one year and makes Class 12 subject tuition the thing families look hardest for. CBSE and ICSE households, more common along OMR and in the older residential pockets, tend to ask for something looser and are more willing to fit lessons around a coaching batch.
Two things are worth settling before you agree to anything. One is the language of the lesson: plenty of students sit in an English-medium classroom and follow the reasoning faster in Tamil, and a family will say so if you ask. The other is the shape of the commitment — a standing slot most days of the week is the normal expectation here, sometimes before school rather than after it. Enquiries also arrive in waves, at the start of the academic year and again once the quarterly and half-yearly marks are out, so the weeks either side of those are when a free slot is easiest to fill.