| Rank* | County | % of 3rd Graders Proficient/ Advanced on 2005 Pact (Math) | Rank* | County | % of 5th Graders Proficient/ Advanced on 2005 Pact (Math) | Rank* | County | % of 8th Graders Proficient/ Advanced on 2005 Pact (Math) |
|---|---|---|---|---|---|---|---|---|
| 1 | Williamsburg | 46.9 | 1 | Horry | 49.2 | 1 | Oconee | 34.7 |
| 2 | Horry | 43.5 | 2 | Lexington | 42.5 | 2 | Anderson | 33.2 |
| 3 | Charleston | 39.1 | 3 | Oconee | 41.8 | 3 | Lexington | 31.9 |
| 4 | York | 38.1 | 4 | Georgetown | 41.1 | 4 | Horry | 30.0 |
| 5 | Pickens | 37.6 | 5 | York | 39.6 | 5 | Spartanburg | 29.8 |
| 6 | Greenville | 37.2 | 6 | Dorchester | 38.6 | 6 | Dorchester | 29.4 |
| 7 | Lexington | 37.0 | 7 | Anderson | 37.3 | 7 | York | 29.2 |
| 8 | Dorchester | 34.5 | 8 | Pickens | 36.7 | 8 | Greenwood | 28.9 |
| 9 | Anderson | 34.3 | 9 | Charleston | 36.4 | 9 | Aiken | 27.8 |
| 10 | Kershaw | 34.2 | 10 | Greenville | 34.5 | 10 | Pickens | 27.7 |
| 11 | Abbeville | 34.0 | 11 | Spartanburg | 33.8 | 11 | Kershaw | 26.3 |
| 12 | Calhoun | 32.4 | 12 | Laurens | 33.7 | 12 | Abbeville | 24.5 |
| 13 | Georgetown | 31.9 | 13 | Greenwood | 32.3 | 13 | Richland | 23.9 |
| 14 | Spartanburg | 31.4 | 14 | Kershaw | 31.8 | 14 | Edgefield | 22.9 |
| 15 | Darlington | 29.9 | 15 | Saluda | 31.0 | 15 | Charleston | 22.7 |
| 16 | Barnwell | 29.9 | 16 | Sumter | 30.8 | 16 | Greenville | 21.6 |
| 17 | Saluda | 29.8 | 17 | Newberry | 30.8 | 17 | Saluda | 21.2 |
| 18 | Greenwood | 27.4 | 18 | Aiken | 30.3 | 18 | Cherokee | 20.6 |
| 19 | Lancaster | 27.0 | 19 | Richland | 30.1 | 19 | Berkeley | 20.0 |
| 20 | Cherokee | 26.8 | 20 | Cherokee | 29.5 | 20 | Chesterfield | 19.9 |
| 21 | Aiken | 26.6 | 21 | Lancaster | 29.3 | 21 | Darlington | 18.8 |
| 22 | Florence | 26.2 | 22 | Dillon | 29.2 | 22 | Beaufort | 18.3 |
| 23 | Richland | 25.6 | 23 | Berkeley | 28.0 | 23 | Chester | 18.3 |
| 24 | Beaufort | 25.6 | 24 | Chesterfield | 27.4 | 24 | Union | 17.9 |
| 25 | Berkeley | 24.8 | 25 | Beaufort | 27.3 | 25 | Laurens | 17.7 |
| 26 | Oconee | 24.6 | 26 | Edgefield | 27.2 | 26 | Lancaster | 16.8 |
| 27 | Dillon | 24.1 | 27 | Abbeville | 25.5 | 27 | Williamsburg | 16.3 |
| 28 | Laurens | 23.6 | 28 | Union | 24.0 | 28 | Newberry | 16.3 |
| 29 | Sumter | 23.4 | 29 | Williamsburg | 23.8 | 29 | Barnwell | 16.0 |
| 30 | Edgefield | 22.1 | 30 | Calhoun | 23.0 | 30 | Clarendon | 15.9 |
| 31 | Clarendon | 22.0 | 31 | Clarendon | 21.9 | 31 | Florence | 15.3 |
| 32 | Chesterfield | 21.9 | 32 | Florence | 21.4 | 32 | McCormick | 14.7 |
| 33 | Newberry | 21.1 | 33 | Darlington | 20.9 | 33 | Sumter | 14.3 |
| 34 | Union | 20.9 | 34 | Barnwell | 19.0 | 34 | Dillon | 14.3 |
| 35 | Colleton | 19.5 | 35 | Bamberg | 16.8 | 35 | Georgetown | 14.0 |
| 36 | Jasper | 19.4 | 36 | Marion | 16.8 | 36 | Calhoun | 13.1 |
| 37 | Chester | 19.1 | 37 | Hampton | 16.4 | 37 | Marion | 11.6 |
| 38 | Orangeburg | 18.5 | 38 | Orangeburg | 15.7 | 38 | Marlboro | 9.7 |
| 39 | Hampton | 17.3 | 39 | Chester | 15.6 | 39 | Lee | 9.4 |
| 40 | Fairfield | 14.2 | 40 | Fairfield | 15.0 | 40 | Bamberg | 8.4 |
| 41 | Marion | 13.7 | 41 | McCormick | 13.9 | 41 | Jasper | 8.2 |
| 42 | Marlboro | 13.4 | 42 | Colleton | 13.4 | 42 | Orangeburg | 7.5 |
| 43 | McCormick | 12.5 | 43 | Allendale | 13.0 | 43 | Fairfield | 7.5 |
| 44 | Bamberg | 12.2 | 44 | Lee | 9.9 | 44 | Hampton | 7.4 |
| 45 | Lee | 8.1 | 45 | Marlboro | 9.3 | 45 | Colleton | 6.9 |
| 46 | Allendale | 7.8 | 46 | Jasper | 6.7 | 46 | Allendale | 5.9 |
| - | South Carolina | 30.9 | - | South Carolina | 32.4 | - | South Carolina | 23.2 |
* 1 is best, 46 is worst.
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