Mezue ahịrịokwu na-esonụ: Okafor abụrụla onye a na-akpọbata nke ọma tupu ụlọ akwụkwọ sekọndrị ma nọrọ n'elu ọkwa ndị na-akpọbata ndị ọrụ ruo ọtụtụ afọ. Ọ gbara bọọlụ basketball nke ụlọ akwụkwọ sekọndrị na Chicago, Illinois maka Whitney M. Young Magnet High School, ebe ọ nwetara ihe nrite nke onye ọkpụkpọ ụlọ akwụkwọ sekọndrị nke afọ site na McDonald's, "USA Today" na "Parade". Na 2012 FIBA Under-17 World Cup, ọ nwetara MVP nke asọmpi ahụ maka ndị otu USA meriri ọla edo. N'afọ 2013, Okafor duziri Whitney Young na 2013 Chicago Public High School League (CPL) obodo. Ọ bụ onye All-American dịka onye na-eto eto na 2013. N'oge okpomọkụ na-esote, ọ bụ onye ahọpụtara n'òtù asọmpi niile na
2013 FIBA Under-19 World Cup, maka ndị meriri ọlaedo Team USA. Mgbe oge okenye ya gasịrị, ọ nwetara nnabata niile nke America ma kpọọ ya onye ọkpụkpọ mba nke afọ site na "Parade", "USA Today" na McDonald n'etiti ndị egwuregwu ndị ọzọ. O bịanyere aka na Duke dị ka ngwugwu na Tyus Jones, na mmata zuru ebe niile dịka onye ọkpụkpọ Collegiate National Player nke Afọ.