As per 2015 rules for admission into the various Engineering and Pure Sciences colleges across India, it is clear that a student must score a minimum of 75% Aggregate marks (of 5 subjects) and a minimum of 75% PCM marks. The XII Boards marks serve merely as eligibility criterion for admission into any National-level college like the IITs, BITS, NITs, IIITs, VIT-Vellore, MANIPAL, IISERs, IIST, IISc, DA-IICT etc.
As far as State-level Engineering college admissions are concerned, there is weightage given to percentile of XII Boards PCM and not marks. Thus, percentile is considered for admissions and not marks as far as State Engineering colleges like COEP, MIT, VIT, SIT, VJTI etc. are concerned. The importance of XII Boards has increased only from 2014 onwards. Prior to 2014, XII Boards had practically no importance as long as a student scored over 60% marks in XII Boards.
In 2018, IIT-P students performed excellently with over 250 students scoring above 90 Percentile points in XII Boards PCM. The highest XII Boards score was 96.2% (CBSE) & 94% (HSC) in IIT-P.
IIT-P teaches all the chapters of XII Boards systematically in the 2-years GRANDMASTERS / TOP DOCTORS program and provides printed notes for XII Boards (separate notes for HSC, CBSE, ISC). Besides that, IIT-P conducts XII Boards Marks Maximiser sessions wherein senior paper correctors and moderators guide students how to write the XII Boards paper. All this ensures that IIT-P students perform excellently in XII Boards in terms of Percentile points which is the only thing that matters in the eventual admission process.