"RTE has done enormous good but still there are gaps. One is 'quality'. RTE talks of infrastructure quality but it requires tremendous attention and detailing.
"But for me even more disturbing thing is that between 2010 and 2014 the year RTE came in, there is a clear 25 per cent drop in standards of education," Subramanian said.
While speaking at a panel discussion, which focused on emerging issues around safe and secure education of children, especially girls, he said giving quality educational environment should be absolutely "non-negotiable".
"All the system has to provide is the environment and a teacher, a child will automatically learn. But we have converted it into a very complicated process," Subramanian said.
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"My Safety My Education...MY RIGHT: Making Education Safe and Secure", organised by Care India, called for a focused campaign and decisive action on the issue if India has to meet the objectives stipulated under Right to Education Act 2009.
"We are looking at the economy and bullet trains but the fundamentals are 'health' and 'education'. These should have preceded with every other step that India took and I see that in Asia so many countries have accepted this," he said.
During discussion, Subramanian also pointed out the 'catastrophic' numbers from Aser's Education report of 2014 and said it draws 'disturbing conclusions' from the educational system in the country.
"After eight years of schooling, basics of arithmetic and calculation are not understood by 50 per cent of children. These are catastrophic numbers," he said.
While referring to 'inclusion' for a healthy educational environment, Subramanian said, "Inclusivity is not understood in India. We think that we have schools so everything is good but we do not understand that 70 per cent of children come from backwards classes.
"We have failed to understand that one illness in a family and a child can lose whole year of education. There is no formal recognition of students from deprived communities and economic backgrounds."
"There is presently a huge divide in the way education is perceived by children in urban and rural settings. There are children who are in a better space and yet have a casual approach to learning, as compared to marginalised children, especially girls for whom even the daily commute to school and back is fraught with challenges.
"We have to address this fundamental issue on priority basis as education occupies the central place in a child's development. Today's consultation is a step forward in this direction," said Rajan Bahadur, MD and CEO, CARE India.