 During his senior season, Lewis averaged 21.7 points and 10 assists a game, while being named "Illinois' 2008 Big School Player of the Year" by MidStateHoops.com., while finishing third for Illinois' Mr. Basketball and earning area Player of the Year honors.He was also a member of Indiana's Elite AAU squad.After graduating high school, Jackson attended Purdue University to play under head coach, Matt Painter, and along with All-Conference players in E'Twaun Moore, Robbie Hummel, and JaJuan Johnson.