| | Johnston, IA | Key Largo, FL | United States |
| Expend. per Student | $14,293 | $20,907 | $15,905 |
| Educ. Expend. per Student | $11,894 | $13,706 | $13,142 |
| Instr. Expend. per Student | $7,373 | $8,686 | $7,999 |
| Pupil/Teacher Ratio | 15.53 | 14.72 | 16.23 |
| Students per Librarian | 799 | 2213 | 4573 |
| Students per Counselor | 362 | 354 | 530 |
| Grade School Educ. | 0.4% | 4.0% | 4.8% |
| Some High School Educ. | 1.7% | 4.1% | 6.3% |
| High School Educ. | 97.9% | 91.8% | 88.9% |
| Some College Educ. | 16.1% | 20.0% | 20.0% |
| 2 yr College Grad. | 10.3% | 8.8% | 8.7% |
| 4 yr College Grad. | 54.6% | 34.6% | 33.7% |
| Masters Grad. | 13.9% | 10.3% | 9.3% |
| Professional Degree | 2.9% | 3.0% | 2.2% |
| Doctorate Degree | 2.2% | 1.6% | 1.5% |