Pedzisa mutsara unotevera: Okafor akanga aunganidzwa zvikuru asati apedza chikoro chesekondari uye akanga ari pamusoro penzvimbo dzokuronga kwemakore anoverengeka. Akatamba basketball yechikoro chesekondari muChicago, Illinois yeWhitney M. Young Magnet High School, kwaakawana mubairo wechikoro chepamusoro wechikoro chegore kubva kuMcDonald's, "USA Today" uye "Parade". Pa2012 FIBA Under-17 World Cup, akawana Tournament MVP yechikwata cheUSA chakahwina menduru yegoridhe. Muna 2013, Okafor akatungamira Whitney Young kuenda ku2013 Chicago Public High School League (CPL) guta reChampionship. Akanga ari All-American somuduku muna 2013. Zhizha rakatevera racho, akanga ari musarudzo yeboka reAll-Tournament pa
2013 FIBA Under-19 World Cup, nokuda kwendarama-medal Team USA. Kutevera mwaka wake mukuru, akawana kuzivikanwa kwakakura kweAll-American uye akatumidzwa zita remutambi wenyika wegore ne "Parade", "USA Nhasi" uye McDonald's pakati pevamwe vatambi. Akasaina naDuke sepasuru naTyus Jones, aine kuzivikanwa kwakapararira seye preseason Collegiate National Player yeGore.