, ▁the ▁primary ▁structure ▁was ▁built ▁in ▁ 1 9 6 1 . ▁In ▁ 1 9 9 1 , ▁Hav re ▁de ▁Grace ▁High ▁School ▁was ▁designated ▁as ▁a ▁National ▁School ▁of ▁Ex cell ence . ▁ ▁Hav re ▁de ▁Grace ▁High ▁School ▁oper ates ▁on ▁a ▁four - period ▁day ▁schedule , ▁with ▁the ▁school ▁day ▁beginning ▁at ▁ 7 : 3 0 ▁AM ▁and ▁ending ▁at ▁ 2 : 0 0 ▁PM . ▁Stud ents ▁are ▁en rolled ▁in ▁eight ▁classes ▁for ▁the ▁year . ▁Some ▁classes ▁will ▁meet ▁daily ▁for ▁a ▁sem ester , ▁while ▁other ▁classes ▁meet ▁every ▁other ▁day . ▁This ▁schedule ▁provides ▁longer ▁periods ▁of ▁instruction ▁( 8 2 ▁minutes ▁per ▁period ) ▁with ▁fewer ▁class ▁changes . ▁ ▁Stud ents ▁ ▁The ▁student ▁population ▁at ▁Hav re ▁de ▁Grace ▁High ▁School ▁has ▁stead ily ▁increased ▁over ▁the ▁past ▁ 1 2 ▁years ▁as ▁shown ▁by ▁the ▁list ▁below . ▁ ▁Over ▁the ▁same ▁time ▁period , ▁the ▁gradu ation ▁rate ▁has ▁stead ily ▁ris en ▁from ▁a ▁percentage ▁in ▁the ▁high ▁ 7 0 s ▁to ▁that ▁in ▁the ▁mid ▁ 8 0 s . ▁ ▁Sports ▁ ▁Hav re ▁de ▁Grace ▁High ▁School ▁is ▁class ified ▁as ▁ 1 A ▁for ▁Regional ▁and ▁State ▁athlet ic ▁cont ests . ▁The ▁school ▁is ▁also ▁a ▁member ▁of ▁the ▁compet itive ▁Upper ▁Ch es ape ake ▁Bay ▁Athlet ic ▁Conference ▁( U CB AC ), ▁which ▁compr ises ▁high ▁schools ▁in ▁both ▁Har ford ▁and ▁Cec