| | Rockville, MD | Petaluma, CA | United States |
| Expend. per Student | $19,736 | $16,850 | $15,905 |
| Educ. Expend. per Student | $16,697 | $13,921 | $13,142 |
| Instr. Expend. per Student | $10,703 | $8,508 | $7,999 |
| Pupil/Teacher Ratio | 13.63 | 20.82 | 16.23 |
| Students per Librarian | 490 | 14240 | 4573 |
| Students per Counselor | 292 | 399 | 530 |
| Grade School Educ. | 3.8% | 4.6% | 4.8% |
| Some High School Educ. | 3.7% | 4.8% | 6.3% |
| High School Educ. | 92.5% | 90.5% | 88.9% |
| Some College Educ. | 12.6% | 24.2% | 20.0% |
| 2 yr College Grad. | 4.6% | 9.4% | 8.7% |
| 4 yr College Grad. | 65.3% | 40.3% | 33.7% |
| Masters Grad. | 22.4% | 9.9% | 9.3% |
| Professional Degree | 5.7% | 3.4% | 2.2% |
| Doctorate Degree | 9.2% | 1.4% | 1.5% |