| | Arnold, MD | Carlisle, PA | United States |
| Expend. per Student | $17,686 | $18,415 | $15,905 |
| Educ. Expend. per Student | $14,577 | $13,693 | $13,142 |
| Instr. Expend. per Student | $9,256 | $8,392 | $7,999 |
| Pupil/Teacher Ratio | 13.83 | 14.46 | 16.23 |
| Students per Librarian | 427 | 731 | 4573 |
| Students per Counselor | 324 | 279 | 530 |
| Grade School Educ. | 1.0% | 2.7% | 4.8% |
| Some High School Educ. | 1.3% | 5.5% | 6.3% |
| High School Educ. | 97.7% | 91.8% | 88.9% |
| Some College Educ. | 21.0% | 16.0% | 20.0% |
| 2 yr College Grad. | 8.4% | 5.1% | 8.7% |
| 4 yr College Grad. | 55.1% | 39.7% | 33.7% |
| Masters Grad. | 19.0% | 11.6% | 9.3% |
| Professional Degree | 3.2% | 2.5% | 2.2% |
| Doctorate Degree | 1.8% | 3.9% | 1.5% |