Produced December 13, 2007; based on 2007 data

This list has been updated since Dec. 13, 2007. The rankings of some schools have changed based on new data given to The Post by schools and school districts.

The Washington Post Challenge Index measures a public high school's effort to challenge its students. The formula is simple: Divide the number of Advanced Placement, International Baccalaureate or Cambridge tests a school gave by the number of seniors who graduated in June. Tests taken by all students, not just seniors, are counted. Magnet or charter schools with SAT combined verbal and math averages higher than 1300, or ACT average scores above 27, are not included, since they do not have enough average students who need a challenge.

The rating is not a measurement of the overall quality of the school but illuminates one factor that many educators consider important.

When compared with schools across the country, Washington-area schools are overall the most encouraging of college-level testing. In the list below, any school with a rating of 1.000 or above is in the top 5 percent of all U.S. high schools in encouraging students to take AP, IB or Cambridge tests. Also listed is the name of the school district and the percentage of a school’s students whose family incomes are low enough to qualify for federally subsidized lunches and who also apply for that program. The portion of subsidized-lunch applicants is a rough indicator of a school’s poverty level. High poverty schools are at a disadvantage in persuading students to take college-level courses, but some on this list have succeeded in doing so anyway.

The Equity and Excellence rate is the percentage of all seniors who have had at least one score on an AP, IB or Cambridge test that would qualify them for college credit. The average AP Equity and Excellence rate for all U.S. schools is about 15 percent.

*Includes IB tests.

**Includes Cambridge, community college or other types of college-level final exams.

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Rank School District Index Equity and Excellence % Subsidized Lunches %
1 H-B Woodlawn Arlington 5.636 93.60 17.00
2 Richard Montgomery* Montgomery 5.061 61.30 15.00
3 Clarke County* Clarke 4.535 82.00 13.00
4 Langley Fairfax 4.280 67.40 1.00
5 Washington-Lee* Arlington 4.179 43.80 36.00
6 George Mason* Falls Church 4.176 65.00 7.00
7 T.S. Wootton Montgomery 4.133 71.50 4.00
8 Bethesda Chevy Chase* Montgomery 4.056 66.80 9.00
9 Whitman Montgomery 4.023 73.50 2.00
10 W. T. Woodson Fairfax 3.907 59.50 6.00
11 Yorktown Arlington 3.896 66.30 15.00
12 Walter Johnson Montgomery 3.893 59.10 6.00
13 Bell Multicultural D.C. 3.888 11.00 81.00
14 Lake Braddock Fairfax 3.681 54.40 11.00
15 Churchill Montgomery 3.658 72.70 3.00
16 McLean Fairfax 3.646 68.20 6.00
17 Oakton Fairfax 3.590 55.40 9.00
18 Centreville Fairfax 3.566 45.30 11.00
19 Chantilly Fairfax 3.346 47.60 11.00
20 Woodrow Wilson D.C. 3.272 35.00 42.00
21 Herndon Fairfax 3.265 53.70 18.00
22 South County Fairfax 3.190 35.00 15.00
23 Westfield Fairfax 3.138 49.50 12.00
24 James Madison Fairfax 3.107 53.60 5.00
25 Banneker* D.C. 3.106 32.00 39.00
26 Loudoun Valley Loudoun 3.032 49.70 4.00
27 Potomac Falls Loudoun 2.977 43.80 9.00
28 Broad Run Loudoun 2.933 40.00 9.00
29 Montgomery Blair Montgomery 2.795 47.60 29.00
30 Broadneck Anne Arundel 2.730 41.50 5.00
31 Robinson* Fairfax 2.718 52.10 10.00
32 West Potomac Fairfax 2.700 39.30 30.00
33 John Handley Winchester 2.615 30.30 30.00
34 West Springfield Fairfax 2.605 52.10 9.00
35 Marshall* Fairfax 2.599 55.40 16.00
36 Loudoun County Loudoun 2.596 40.50 10.00
37 Fairfax Fairfax 2.587 42.70 16.00
38 Stone Bridge Loudoun 2.562 49.10 5.00
39 Dominion Loudoun 2.551 38.80 12.00
40 Centennial Howard 2.547 46.80 4.00
41 Severna Park Anne Arundel 2.494 43.50 2.00
42 Hylton Prince William 2.493 23.50 20.00
43 River Hill Howard 2.472 47.20 4.00
44 Springbrook* Montgomery 2.466 40.20 28.00
45 Poolesville Montgomery 2.411 55.70 3.00
46 Rockville Montgomery 2.410 43.90 18.00
47 Stuart* Fairfax 2.378 43.10 51.00
48 Einstein* Montgomery 2.358 41.30 32.00
49 Blake Montgomery 2.339 43.00 13.00
50 Annapolis* Anne Arundel 2.298 18.20 28.00
51 Falls Church Fairfax 2.245 35.20 37.00
52 McDonough Charles 2.216 19.00 18.00
53 South River Anne Arundel 2.182 35.20 4.00
54 Paint Branch Montgomery 2.162 36.10 19.00
55 Wakefield Arlington 2.157 38.40 52.00
56 Middletown Frederick 2.133 46.00 5.00
57 Watkins Mill* Montgomery 2.115 40.80 28.00
58 Heritage Loudoun 2.108 33.60 17.00
59 Northwest Montgomery 2.040 34.20 15.00
60 Sherwood Montgomery 2.002 44.10 10.00
61 Old Mill* Anne Arundel 1.998 31.00 15.00
62 Eleanor Roosevelt Prince George's 1.992 30.00 20.00
63 South Lakes* Fairfax 1.991 41.50 33.00
64 Patuxent Calvert 1.951 32.20 8.00
65 Park View Loudoun 1.937 30.00 30.00
66 Magruder Montgomery 1.933 39.50 18.00
67 Rappahannock County** Rappahannock 1.932 44.00 15.00
68 Potomac** Prince William 1.919 14.50 30.00
69 SEED Public Charter School D.C. 1.917 20.00 73.00
70 Huntingtown Calvert 1.912 n/a 6.00
71 Linganore Frederick 1.842 39.10 5.00
72 Leonardtown St. Mary's 1.836 29.10 12.00
73 Osbourn Park Prince William 1.827 39.10 12.00
74 La Plata Charles 1.771 20.20 11.00
75 Gaithersburg Montgomery 1.757 32.20 24.00
76 Southern Anne Arundel 1.738 19.00 11.00
78 Stonewall Jackson* Prince William 1.706 28.80 31.00
77 Hyde D.C. 1.706 n/a 50.00
79 Quince Orchard Montgomery 1.704 43.40 16.00
80 Gar-Field* Prince William 1.694 25.30 38.00
81 Colonial Forge Stafford 1.655 34.20 9.00
111 Mount Hebron Howard 1.647 35.80 7.00
83 Urbana* Frederick 1.645 43.00 4.00
84 Edison* Fairfax 1.635 42.40 29.00
85 T.C. Williams** Alexandria 1.590 22.50 50.00
86 Lee* Fairfax 1.582 37.60 32.00
87 Hayfield Fairfax 1.577 27.20 21.00
88 Frederick Frederick 1.572 34.40 28.00
89 Wheaton Montgomery 1.557 27.30 41.00
90 Gov. Thomas Johnson Frederick 1.556 28.80 19.00
91 Woodbridge Prince William 1.546 23.90 23.00
92 Fauquier Fauquier 1.520 23.10 10.00
93 Massaponax Spotsylvania 1.514 23.00 15.00
94 Mount Vernon* Fairfax 1.511 34.90 38.00
95 Seneca Valley** Montgomery 1.506 25.70 21.00
96 Damascus Montgomery 1.495 38.70 8.00
97 Great Mills St. Mary's 1.482 18.10 30.00
98 School Without Walls D.C. 1.468 35.00 13.00
99 Riverbend Spotsylvania 1.462 22.00 10.00
100 Brunswick Frederick 1.454 28.60 14.00
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*Includes IB tests.

**Includes Cambridge, community college or other types of college-level final exams.

Thomas Jefferson High School for Science and Technology in Fairfax County, with a rating of 7.486 and an Equity and Excellence rate of 100 percent, was not ranked because it is a magnet school with a selective admissions policy and an average SAT reading and math score, 1456, higher than the highest average for any regular enrollment school in the country. The index is designed to show which schools are challenging average students and does not work well with schools like Jefferson that have few or no average students.

Briar Woods and Freedom in Loudoun County, Battlefield and Freedom in Prince William County, Skyline in Warren County, Clarksburg and Northwood in Montgomery County, Dr. Henry A. Wise Jr. in Prince George’s County, Marriotts Ridge in Howard County and North Point in Charles County were not included because they are new schools and did not have full senior classes graduating this year.

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