D-211 vs D-15 for more money. It's for the kids, right?

http://www.familytaxpayers.org/salary.php   How did Robb get a $90 Thousand dollar pay increase in the last (5) years?  
Year 2007 Name: Robb Nancy L
Salary: $172,958
Position: Assistant District Superintendent
Full/Part Time: Fulltime
Percent Time Employed: 100%
Assignment: Administration
Years Teaching: 32
Degree: Doctorate
School Name: HOFFMAN ESTATES HIGH SCHOOL
District Name: TOWNSHIP HSD 211

Year 2012 Name: Robb, Nancy
Salary: $262,967
Position: District Superintendent
Full/Part Time: Fulltime
Percent Time Employed: 100%
Assignment: Administration
Years Teaching: 37
Degree: Doctorate
School Name: Township HSD 211
District Name: Township HSD 211