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A lot of basketball to be played, but we have enough data to release our first RPI computer rankings.

Girls Ratings Percentage Index (RPI) Rankings through 12/31/21

Below are our initial Ratings Percentage Index (RPI) ratings of public schools as we begin 2022 play. The RPI is a method once used by the NCAA to determine tournament teams. Now, that organization uses the NET rankings as an aide to help decide who makes the NCAA Tournament.

We’re not even sure what the NET formula is, but we know the RPI. It’s not a perfect tool but it remains a useful one that some states presently use to determine playoff teams. For example, the state of Kentucky uses it. (Kudos to Kentucky, they even weight football wins based on how big a school you beat!)

RPI takes into account teams’ strength of schedule, and even teams’ opponents’ strength of schedule (SOS), if you can follow that. Fortunately we have a “master statistician” that does follow it, a gentleman we know who actually majored in something useful in college. Our model also weights road wins (1.4x) more than neutral site (1.0x) and home wins (0.6x), and thus conversely “penalizes” home losses more than road ones.

For this model we ONLY use games with the schools included in this chart. If you played an out-of-town team, or a private school, that result is NOT included in this model. There is no way to really include those games based on the strength of schedule metrics.

These rankings are not perfect, especially because some teams haven’t played enough games yet. But RPI and computer rankings are a useful tool and we’ll update them a few more times this season for your enjoyment.

Public School RPI Rankings – GIRLS

Games as of:

12/30/2021

RPI Rank Team Conference W L RPI

SOS

1 Woodgrove Potomac 9 0 0.678136 0.570848
2 Madison Concorde 8 1 0.645038 0.552359
3 Lake Braddock Patriot 9 2 0.640431 0.593302
4 Centreville Concorde 5 3 0.637500 0.655555
5 Robinson Patriot 7 1 0.630265 0.528759
6 Oakton Concorde 11 0 0.626460 0.501946
7 Yorktown Liberty 7 3 0.621501 0.571723
8 Langley Liberty 7 1 0.615089 0.539816
9 Osbourn Park Cedar Run 5 1 0.612822 0.567097
10 Loudoun Valley Dulles 6 1 0.592283 0.527085
11 Patriot Cedar Run 4 2 0.573394 0.514525
12 West Springfield Patriot 5 4 0.567642 0.547554
13 Potomac Cardinal 3 1 0.567480 0.499065
14 Meridian Northwestern 8 1 0.565757 0.468628
15 Broad Run Dulles 5 2 0.562003 0.529825
16 Briar Woods Potomac 4 2 0.549519 0.476282
17 Edison National 5 3 0.547952 0.505112
18 Westfield Liberty 3 2 0.525178 0.539743
19 Woodson Patriot 3 2 0.524362 0.538656
20 West Potomac Patriot 3 2 0.523334 0.514983
21 McLean Liberty 6 5 0.522786 0.508369
22 Potomac Falls Potomac 5 3 0.522454 0.471606
23 Riverside Potomac 6 2 0.509983 0.429977
24 South Lakes Concorde 4 3 0.506253 0.476422
25 Alexandria City Patriot 5 1 0.504014 0.382545
26 Marshall Liberty 4 5 0.502347 0.498856
27 Chantilly Concorde 5 5 0.498106 0.504420
28 Herndon Liberty 7 4 0.485612 0.466196
29 Woodbridge Cardinal 3 4 0.484957 0.518404
30 Colgan Cardinal 5 4 0.483879 0.445172
31 Heritage Dulles 3 6 0.479895 0.502605
32 Mount Vernon National 3 4 0.476891 0.517576
33 Falls Church National 3 6 0.468848 0.493347
34 Freedom-South Riding Cedar Run 2 4 0.464057 0.507632
35 Washington-Liberty Liberty 2 6 0.463534 0.512782
36 Stone Bridge Potomac 5 2 0.458022 0.391184
37 Tuscarora Dulles 6 3 0.455264 0.384797
38 Fairfax Patriot 0 6 0.455102 0.606802
39 Dominion Dulles 1 6 0.454268 0.548780
40 Hayfield National 3 2 0.453313 0.416011
41 Forest Park Cardinal 4 5 0.449993 0.437389
42 Park View Dulles 7 1 0.448498 0.289664
43 Loudoun County Dulles 3 7 0.439410 0.480324
44 John Champe Cedar Run 1 5 0.436560 0.543618
45 Brentsville Northwestern 6 1 0.434091 0.275757
46 Battlefield Cedar Run 4 6 0.431372 0.446957
47 Osbourn Cedar Run 6 4 0.431018 0.408024
48 South County Patriot 1 4 0.414028 0.465618
49 Jefferson National 1 6 0.413219 0.480252
50 Gainesville Cedar Run 3 4 0.408058 0.394652
51 Wakefield Concorde 0 7 0.407290 0.543054
52 Lewis National 1 5 0.407149 0.474238
53 Lightridge Dulles 3 8 0.397125 0.453477
54 Hylton Cardinal 3 5 0.382435 0.368247
55 Freedom-Woodbridge Cardinal 1 5 0.374852 0.461341
56 Justice National 3 7 0.368085 0.398187
57 Unity Reed Cedar Run 1 6 0.365748 0.457361
58 Rock Ridge Dulles 1 7 0.365231 0.445308
59 Independence Potomac 0 6 0.353371 0.471161
60 Annandale National 0 6 0.338643 0.451524
61 Gar-Field Cardinal 0 9 0.318878 0.425170
62 Manassas Park Northwestern 0 9 0.265831 0.354441