My son is in 10th standard and we have shifted in may 2015 in mumbai from gurgaon and he got admitted in Ryan international school Kandivali. Now he is in 10th standard and got very less percentage in 9th He is not taking interest in his study do not want to go to school always busy with mobile and get irritated when ask to give the mobile from feb 2016 he suffered from plural effusion and taking medicine from feb till octb. If we say anything either regarding mobile or studying he blackmail that he will not take the medicine. So please help in which we may tackle him so that he may take interest in his study and mitigate the interest in mobile.