In her collegiate debut on November 17, 2006, DeHaan scored a team-high 15 points. Two days later, she set a then-school-record with eight blocked shots, seven of which she made in the second half, as well as scoring her first career double-double in the game, scoring 11 points, and making 11 rebounds. On November 24, 2006, DeHaan scored 17 points and nine rebounds in a game her team won 85–66. Her dominance continued on November 29, 2006, when she made another career-high 28 points and 10 rebounds for her second career double-double, which was the second-highest game total for a freshman in Michigan State history.