| | Petersham, MA | Arlington, MA | United States |
| Expend. per Student | $19,742 | $23,560 | $15,905 |
| Educ. Expend. per Student | $16,667 | $19,196 | $13,142 |
| Instr. Expend. per Student | $10,582 | $12,141 | $7,999 |
| Pupil/Teacher Ratio | 12.69 | 11.99 | 16.23 |
| Students per Librarian | 464 | 354 | 4573 |
| Students per Counselor | 379 | 331 | 530 |
| Grade School Educ. | 0.0% | 1.3% | 4.8% |
| Some High School Educ. | 3.7% | 1.4% | 6.3% |
| High School Educ. | 96.3% | 97.3% | 88.9% |
| Some College Educ. | 22.9% | 8.5% | 20.0% |
| 2 yr College Grad. | 5.4% | 4.0% | 8.7% |
| 4 yr College Grad. | 46.0% | 74.2% | 33.7% |
| Masters Grad. | 17.8% | 28.6% | 9.3% |
| Professional Degree | 2.3% | 5.9% | 2.2% |
| Doctorate Degree | 3.3% | 8.3% | 1.5% |