 Kool played AAU basketball on the Michigan Mustangs with several other college and NBA players such as Al Horford and Drew Neitzel.Kool played college basketball for the Broncos of Western Michigan University, wearing number 23.Kool sat out the first few games of the Bronco's 2006–07 campaign due to a leg injury, but became the Bronco's starting guard, playing both point guard and shooting guard.