See Win-Loss Factor for an explanation. There are four
 different percentages. The 1st is based on all games, the
 2nd on games played within the division/state, the 3rd weighs games played later in the season more heavily and the 4th
 weighs road wins and home losses more heavily. This factor is not used in the college power rating calculation and only the first percentage is used in the high
 school power rating calculation   
 
  
  
   
           
           

Congratulations to 2010 League Champions - Haverford School (IAC), Shipley School (FSL) and Perkiomen School (TCL)
     
  
  
   
Rank Team                       W-L Tot    W-L Div   W-L Date   W-L Road    W  L  T
                               Rnk Value  Rnk Value  Rnk Value  Rnk Value
 
   1 Shipley School             1  88.89   1  90.91   1  86.34   1  85.71  16  2  0
   2 Haverford School           2  83.33   3  80.00   2  86.22   2  82.14  20  4  0
   3 Collegium Charter          3  75.00   4  75.00   6  64.32   3  78.95  12  4  0
   4 Perkiomen School           4  73.68   2  82.35   3  82.46   5  70.97  14  5  0
   5 Episcopal Academy          5  72.73   6  71.43   4  68.44   4  76.00  16  6  0
   6 Malvern Prep               6  61.90   5  72.73   8  61.28   9  58.10  13  8  0
   7 Kimberton Waldorf          7  58.33   9  58.33  10  54.12   8  58.93   7  5  0
   8 Academy New Church         8  57.89  12  50.00  12  52.56  10  57.65  11  8  0
   9 Kiski Prep                 9  57.14   7  66.67   9  59.34   6  62.37  12  9  0
  10 Wyoming Seminary          10  57.14  13  50.00   5  66.16   7  61.54   8  6  0
  11 Hill School               11  56.25   8  62.50   7  64.00  14  50.00   9  7  0
  12 Delaware Friends          12  53.33  11  53.33  11  53.33  11  54.79   8  7  0
  13 Germantown Academy        13  52.94  22  27.27  14  42.50  12  54.02   9  8  0
  14 Penn Charter              14  50.00  16  40.00  13  45.86  13  50.00  10 10  0
  15 George School             15  41.67  10  57.14  17  36.52  17  39.58   5  7  0
  16 Chestnut Hill Academy     16  41.18  21  27.27  16  41.18  16  39.76   7 10  0
  17 Westtown                  17  36.36  17  37.50  19  33.04  15  42.11   4  7  0
  18 Valley Forge              18  35.71  18  35.71  15  41.61  18  36.49   5  9  0
  19 Devon Prep                19  33.33  19  33.33  18  33.33  19  33.33   4  8  0
  20 Oxford Area               20  27.78  14  41.67  20  30.23  20  26.74   2  6  1
  21 Woodlynde                 21  23.08  23  16.67  22  19.87  21  20.63   3 10  0
  22 Delaware Cty Christian    22  16.67  15  40.00  21  24.16  23  16.67   2 10  0
  23 Friends Central           23  16.67  20  28.57  24  11.05  22  19.23   2 10  0
  24 Twin Valley               24  10.00  24  12.50  23  15.00  24   6.52   0  4  1
  25 Mercersburg Academy       25   0.00  25   0.00  25   0.00  25   0.00   0 12  0
  26 Phelps                    26   0.00  26   0.00  26   0.00  26   0.00   0 12  0