the Frage is for the smart peoples so....

hi guys give me an advise how many hours should i be on net oder Fanpop in school time im so afraid that this Fanpop make my degrees down. in summer time i often 2-5 hours on net but in school ipalned for 1 to 2 Stunde what do u think plz give me an answer 8 Requisiten for best advise .thnx