See Strength of Schedule for an explanation. There are three sos calculations:
the 1st averages the opponents computer rating based on
 computer margin of victory "Reg In" and "ROM", the 2nd
 is similar to the first but instead of a simple average, it
 weighs games against stronger teams more heavily, and
 the 3rd is based on the RPI SOS formula used by the NCAA. This factor is not used in the power rating calculation.
          
      
   
     
   
           
           

Use the Report Scores link for both scores and missing games.
     
  
  
   
Rank Team                    Total  SOS Ave   SOS Wt Ave  SOS RPI    W  L  T
                             Games Rnk Value  Rnk Value  Rnk Value
 
   1 Arrowhead Club            14   1  58.16   2  26.15   1   0.60   3 11  0
   2 Arrowhead                 24   2  58.11   1  26.59   9   0.49  16  8  0
   3 Waukesha West             16   3  56.57   3  24.37   5   0.51   1 15  0
   4 Oconomowoc                16   4  56.49   4  24.33   4   0.52   2 14  0
   5 Mukwonago                 15   5  56.28   5  24.12   2   0.54   3 12  0
   6 Brookfield, WI            21   6  55.73   6  23.60   3   0.53  14  6  1
   7 Oregon                    15   7  54.74   7  22.63  10   0.49   2 13  0
   8 Kettle Moraine            24   8  54.27   8  22.07  13   0.47  16  8  0
   9 University HS, WI         15   9  54.23   9  22.05   7   0.50  11  4  0
  10 LaFollette                13  10  54.08  10  21.62  12   0.48   0 13  0
  11 Sun Prairie               15  11  53.36  11  21.16  15   0.46   6  9  0
  12 Verona, WI                19  12  52.85  12  20.61   6   0.51  12  6  1
  13 Waunakee                  13  13  52.71  13  20.46  11   0.48   6  7  0
  14 Madison West, WI          16  14  52.59  14  20.27   8   0.50  13  3  0
  15 Middleton, WI             14  15  52.07  15  19.82  14   0.47  10  4  0