Students should cultivate the habit of not only studying hard to score more marks, but also should focus on overall personality development, ISRO Chairman designate V Narayanan said here on Sunday. Narayanan, who is currently the Director of the Liquid Propulsion Systems Centre at Thiruvananthapuram, was here to offer prayers at a temple in his hometown. He extended his gratitude to his well-wishers and relatives who had been greeting him on his appointment as the Secretary, Department of Space by the Centre last week. "Students should first learn how to study. At a young age, a student may hail from different kinds of backgrounds. They may study whatever they want. But what is important is how they study their subjects. At the time of learning, they should also focus on overall personality development," he told reporters. Elaborating, he said, students should adopt two education systems - 'value based' and 'intellectual based'. "Intellectual-based education is what they study in .