| Index | Greater Gardendale | San Antonio | Texas |
| Average Test Scores | 25% | 42% | 47% |
| Student/Teacher ratio | n/a | 15:1 | 14:1 |
| Total public schools | n/a | 445 | 7,418 |
| Total private schools | n/a | 92 | 1,267 |
| Total post-secondary schools | n/a | 32 | 463 |
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| Index | Greater Gardendale | San Antonio | Texas |
| Completed 8th grade | 54.0% | 78.5% | 79.3% |
| Completed high school | 51.9% | 76.8% | 77.8% |
| Completed some college | 17.3% | 55.5% | 57.3% |
| Completed associate degree | 3.7% | 32.6% | 34.9% |
| Completed bachelors | 2.1% | 25.2% | 28.1% |
| Completed masters | 0.8% | 8.9% | 9.6% |
| Completed professional degree | 0.0% | 2.6% | 2.6% |
| Completed doctorate | 0.0% | 1.0% | 1.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Castle Hills, TX | 4,459 | 85% | 76.0% |
| Live Oak, TX | 16,118 | 83% | 72.4% |
| Helotes, TX | 9,525 | 69% | 44.4% |
| Leon Valley, TX | 12,279 | 55% | 13.5% |
| LaCoste, TX | 1,936 | 53% | 10.4% |
| San Antonio, TX | 1,529,133 | 42% | 13.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Philadelphia, PA | 1,581,531 | 29% | 38.7% |
| San Diego, CA | 1,414,545 | 51% | 6.9% |
| Phoenix, AZ | 1,658,422 | 39% | 18.6% |
| Dallas, TX | 1,338,846 | 45% | 6.3% |
| San Jose, CA | 1,029,409 | 48% | 0.7% |
| San Antonio, TX | 1,529,133 | 42% | 13.1% |
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