| Rank* | County | Percent of 3rd Graders Below Basic on 2008 PACT (Math) | Rank* | County | Percent of 5th Graders Below Basic on 2008 PACT (Math) | Rank* | County | Percent of 8th Graders Below Basic on 2008 PACT (Math) |
|---|---|---|---|---|---|---|---|---|
| 1 | Calhoun | 7.4 | 2 | Horry | 13.3 | 2 | Oconee | 16.4 |
| 2 | Abbeville | 14.5 | 1 | Pickens | 14.6 | 1 | Anderson | 17.4 |
| 3 | Horry | 15.1 | 3 | Georgetown | 15.1 | 3 | York | 20.0 |
| 4 | Pickens | 16.6 | 4 | Anderson | 15.5 | 4 | Horry | 22.1 |
| 5 | Dorchester | 17.0 | 5 | Lancaster | 16.2 | 5 | Kershaw | 23.1 |
| 6 | Georgetown | 17.1 | 6 | Calhoun | 16.3 | 6 | Lexington | 23.5 |
| 6 | York | 17.1 | 7 | Abbeville | 16.9 | 7 | Spartanburg | 23.7 |
| 8 | Anderson | 18.1 | 8 | York | 17.2 | 8 | Saluda | 24.1 |
| 9 | Greenville | 18.3 | 9 | Greenwood | 17.3 | 9 | Aiken | 24.4 |
| 10 | Lexington | 18.5 | 10 | Saluda | 17.4 | 10 | Lancaster | 24.9 |
| 11 | Spartanburg | 19.7 | 11 | Lexington | 18.0 | 11 | Pickens | 27.3 |
| 12 | Kershaw | 20.7 | 12 | Oconee | 18.2 | 12 | Laurens | 28.9 |
| 12 | Union | 20.7 | 13 | Spartanburg | 19.5 | 13 | Edgefield | 29.5 |
| 14 | Oconee | 21.5 | 14 | Greenville | 19.8 | 14 | Cherokee | 29.6 |
| 15 | Charleston | 22.2 | 15 | Dorchester | 20.1 | 15 | Dorchester | 29.8 |
| 16 | Williamsburg | 22.4 | 16 | Kershaw | 21.1 | 16 | Charleston | 30.3 |
| 16 | Aiken | 23.4 | 17 | Berkeley | 21.6 | 16 | McCormick | 30.3 |
| 16 | Berkeley | 23.4 | 18 | Aiken | 21.7 | 18 | Georgetown | 30.4 |
| 19 | Edgefield | 23.7 | 19 | Newberry | 21.8 | 18 | Greenwood | 30.4 |
| 20 | Dillon | 23.9 | 20 | Charleston | 21.9 | 20 | Greenville | 30.8 |
| 21 | Chesterfield | 25.0 | 21 | Sumter | 22.9 | 21 | Beaufort | 31.4 |
| 22 | Beaufort | 26.2 | 22 | Florence | 23.3 | 22 | Union | 32.0 |
| 22 | Cherokee | 26.2 | 23 | Cherokee | 23.4 | 23 | Berkeley | 33.2 |
| 22 | Lancaster | 26.2 | 24 | Beaufort | 23.5 | 24 | Abbeville | 34.2 |
| 25 | Florence | 26.3 | 24 | Edgefield | 23.5 | 25 | Darlington | 35.0 |
| 26 | Greenwood | 26.5 | 26 | McCormick | 25.5 | 26 | Calhoun | 35.8 |
| 26 | Newberry | 26.5 | 27 | Laurens | 25.6 | 27 | Richland | 36.8 |
| 28 | Sumter | 26.9 | 28 | Richland | 26.5 | 28 | Chesterfield | 36.9 |
| 29 | Laurens | 27.0 | 29 | Chesterfield | 27.5 | 29 | Colleton | 37.1 |
| 30 | McCormick | 27.6 | 30 | Dillon | 28.3 | 30 | Dillon | 37.4 |
| 31 | Darlington | 28.1 | 31 | Darlington | 30.3 | 31 | Newberry | 38.1 |
| 32 | Richland | 28.9 | 32 | Fairfield | 31.2 | 31 | Sumter | 38.1 |
| 32 | Saluda | 28.9 | 33 | Clarendon | 31.6 | 33 | Florence | 38.4 |
| 34 | Colleton | 30.7 | 34 | Hampton | 31.7 | 34 | Clarendon | 39.2 |
| 35 | Chester | 31.5 | 35 | Chester | 32.3 | 35 | Barnwell | 40.9 |
| 36 | Clarendon | 33.9 | 36 | Barnwell | 33.7 | 36 | Marlboro | 42.1 |
| 37 | Bamberg | 35.0 | 37 | Bamberg | 34.5 | 37 | Hampton | 43.4 |
| 38 | Marlboro | 35.3 | 38 | Marion | 34.7 | 38 | Orangeburg | 45.5 |
| 39 | Hampton | 36.1 | 39 | Union | 35.8 | 39 | Fairfield | 45.9 |
| 40 | Orangeburg | 36.3 | 40 | Orangeburg | 36.4 | 40 | Chester | 46.2 |
| 41 | Barnwell | 38.6 | 41 | Colleton | 37.1 | 41 | Bamberg | 47.6 |
| 42 | Fairfield | 40.4 | 42 | Williamsburg | 38.2 | 42 | Williamsburg | 48.1 |
| 43 | Jasper | 44.5 | 43 | Marlboro | 46.3 | 43 | Lee | 57.0 |
| 44 | Marion | 44.8 | 44 | Allendale | 52.4 | 44 | Marion | 59.2 |
| 45 | Lee | 57.3 | 45 | Lee | 53.6 | 45 | Jasper | 59.8 |
| 46 | Allendale | 59.1 | 46 | Jasper | 63.9 | 46 | Allendale | 60.2 |
| South Carolina | 22.8 | South Carolina | 22.0 | South Carolina | 30.3 |
* 1 is best, 46 is worst.