original: he excelled in history throughout his school years while his grades in other subjects remained average .
simplifications: his history grades were high , but average for his other subjects , during the school years . he excelled in history all throughout school while his grades in other subjects remained average . he did well in history during his school years , but his grades in other subjects remained average . he did well in history throughout his school years while his grades in other subjects stayed average . he excelled in history in all his school years but his grades in other subjects were still average . he excelled in history throughout his school years while his grades in other subjects remained average . he did extremely well in history through his school years while his grades in other subjects were typical . he excelled in history during school years while his grades in other subjects remained average .