The 5-foot-10 Downers Grove North junior guard is the youngest of five siblings. Campbell was a freshman on the Downers Grove North team two years ago that won a program-record 30 games and lost to Waubonsie Valley in a sectional semifinal. Wherever she ends up collegiately, Thulin is a kid who Downers Grove North Stephan Bolt said will be tough to keep off the floor. Yerkovich made a number of big shots, and had a game-saving block, in Downers Grove North’s win over Glenbard West Jan. 17. Downers Grove North is at the Hinsdale Central Sectional with Nazareth and Kenwood the other top contenders.