Vice President Venkaiah Naidu on Saturday said that the "overhauling" of the education system is long overdue and called for the total elimination of "colonial mindset" and that "real history" must be taught in educational institutions. "The overhauling of the education system is long overdue. We must eliminate totally colonial mindset, teach real history, ancient civilisation, culture and heritage and instill values of nationalism among students," Naidu said in the national capital where he interacted with the students of the Jawaharlal Nehru University (JNU).