| | Irmo, SC | Northbrook, IL | United States |
| Expend. per Student | $17,157 | $21,907 | $15,905 |
| Educ. Expend. per Student | $14,952 | $18,508 | $13,142 |
| Instr. Expend. per Student | $9,360 | $11,567 | $7,999 |
| Pupil/Teacher Ratio | 15.36 | 13.97 | 16.23 |
| Students per Librarian | 574 | 1480 | 4573 |
| Students per Counselor | 336 | 481 | 530 |
| Grade School Educ. | 2.5% | 1.0% | 4.8% |
| Some High School Educ. | 2.6% | 0.9% | 6.3% |
| High School Educ. | 95.0% | 98.2% | 88.9% |
| Some College Educ. | 26.8% | 11.2% | 20.0% |
| 2 yr College Grad. | 11.2% | 4.3% | 8.7% |
| 4 yr College Grad. | 38.0% | 71.9% | 33.7% |
| Masters Grad. | 10.2% | 23.0% | 9.3% |
| Professional Degree | 0.6% | 10.1% | 2.2% |
| Doctorate Degree | 0.6% | 4.4% | 1.5% |