In high school, Miller was the 2005 West Virginia Mr. Basketball. Miller also spent two years after high school at Harmony Prep in Cincinnati, Ohio before signing with Nebraska.
Capital High School
In 2005, Miller led Capital High School in Charleston, West Virginia to a 21-5 record and a state semifinal berth. Miller was named the 2005 West Virginia Mr. Basketball finishing just ahead of runner-up and current RedHawk Adam Fletcher. Kentucky's Patrick Patterson finished third in the voting.
Miller was a three time first team all-state selection. Miller finished as the school's career leader with more than 1,500 points.
Harmony Community School (Prep School)
After graduation, Miller spent two years prepping at Cincinnati Harmony Community School. In his first year, Miller averaged 17 points per game and over 11 assists (including a school record 22 assists in a game). During his second year at Harmony (2006-07), Miller averaged 18.1 points, 8.4 assists and 2.3 steals per game.
During his frosh season with the Nebraska Cornhuskers, Miller averaged 26.6 minutes a game. He twice led the team in scoring. He led Nebraska in assists in 17 games and steals 11 times. His per game averages were 6.1 points, 2.1 rebounds, 3.6 assists, and 1.93. Miller shot 47.3% from inside the arc and 67.8% from the line.
Miller posted the second-highest assist total in history for a Nebraska freshman (109) and was 6th overall in the B12 (5th in league games). He was 4th in the conference in steals (1st among frosh). The total number of steals (58) is 2nd most in school history for a freshman.
This past season as a sophomore Cookie averaged 7.3 points per game. He again had 109 assists to go with 45 steals. Starting in 22 games, he average 28.5 minutes (2nd most on the team). He shot 42.6% percent from the field, 39% from behind the arc, and 81.7% from the line. For the second straight season, Miller finished among the Big 12 leaders for assists per game (8th, 3.63 apg) and assist-to-turnover ratio (8th, 1.85). Miller's 103 steals in two seasons is the 2nd highest two year total in school history.
Once Miller becomes eligible during the 2010-11 season, he will essentially be a 6th year junior having played two years of prep school, two years at Nebraska, and then sitting out the 2009-10 transfer year. He will help replace Miami point guard and MAC Player of the Year candidate Kenny Hayes who will be graduating at the end of the 2009-10 season.