As a senior, she led Regina High School to the Division III state final four. The Regina Royals lost in the semifinals to Versailles. Selby averaged 24.3 points, 7.7 rebounds, 6.4 assists, 4.7 steals and 1.6 blocks per game. Coming out of high school, her 2008 Class Rankings were as follows: 13th (Hoopgurlz), 26th (Blue Star), 33rd (All-Star Girls Report) and No. 1 point guard in class by Hoopgurlz.