| Index | San Carlos I | Texas | National |
| Average Test Scores | n/a | 47% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | San Carlos I | Texas | National |
| Completed 8th grade | 16.4% | 79.3% | 84.3% |
| Completed high school | 16.4% | 77.8% | 83.0% |
| Completed some college | 0.0% | 57.3% | 59.4% |
| Completed associate degree | 0.0% | 34.9% | 38.5% |
| Completed bachelors | 0.0% | 28.1% | 30.3% |
| Completed masters | 0.0% | 9.6% | 11.5% |
| Completed professional degree | 0.0% | 2.6% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in San Carlos I. Using the proficiency score averages, the average test scores for San Carlos I, TX schools is n/a. The average student to teacher ratio is n/a. In San Carlos I, TX, an average of 16.4% of students have completed 8th grade and an average of 16.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Laredo, TX | 260,571 | 54% | 12.2% |
| Rio Bravo, TX | 4,686 | 46% | 5.2% |
| San Carlos I, TX | 309 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Clifton, VA | 309 | 89% | 84.7% |
| Bancroft, ID | 309 | 50% | 4.2% |
| Selfridge, ND | 309 | 23% | 53.1% |
| Gallina, NM | 308 | 29% | 39.2% |
| Amazonia, MO | 310 | 45% | 6.3% |
| San Carlos I, TX | 309 | n/a |
Here are the best places to live in Texas
Most Dangerous Cities In The US
Check out the 10 most dangerous cities in Texas
These are the 10 cheapest cities in Texas