| | Plainfield, IL | Dover, DE | United States |
| Expend. per Student | $18,169 | $16,576 | $15,905 |
| Educ. Expend. per Student | $16,222 | $14,812 | $13,142 |
| Instr. Expend. per Student | $9,784 | $8,755 | $7,999 |
| Pupil/Teacher Ratio | 14.41 | 14.38 | 16.23 |
| Students per Librarian | 1491 | 1206 | 4573 |
| Students per Counselor | 776 | 357 | 530 |
| Grade School Educ. | 1.8% | 2.2% | 4.8% |
| Some High School Educ. | 1.9% | 9.1% | 6.3% |
| High School Educ. | 96.3% | 88.8% | 88.9% |
| Some College Educ. | 16.2% | 22.6% | 20.0% |
| 2 yr College Grad. | 8.4% | 10.1% | 8.7% |
| 4 yr College Grad. | 55.5% | 25.9% | 33.7% |
| Masters Grad. | 15.3% | 9.1% | 9.3% |
| Professional Degree | 2.6% | 1.2% | 2.2% |
| Doctorate Degree | 1.9% | 1.3% | 1.5% |