 His senior year, Henson transferred to Sickles High School in Tampa, Florida.Henson wore the jersey number 33, averaging 17.6 points, 12.2 rebounds, and 6.1 blocks per game as a senior in 2008–09.He scored a season-high 29 points against Tampa Bay Tech and blocked 10 or more shots five times with a high of 11 on four occasions as a senior as well.