Kolkata: School heads and academics across the state have strongly backed chief minister Suvendu Adhikari’s Teachers’ Day address on reducing screen time, expressing hope that clear guidelines restricting mobile usage among students will soon be issued.Most school heads who spoke to TOI on Sunday highlighted that it has become increasingly difficult to retain the attention of students, especially adolescents.Raja Dey, headmaster of Bhawanipur Mitra Institution—the recipient of this year’s Vidyasagar Sera Vidyalaya Award—said, “We welcome stringent measures to restrict mobile phone usage because maintaining student concentration has become a major challenge. The addiction is so severe that even parents are…