For Continuing Education Units
| Grade | Percentage |
| CR | 80% or above; Successfully completed (Credit Received) |
| NC | 79% or lower; Did not successfully complete (No Credit) |
| AU | Audit; No credit attempted |
For UIS Graduate Academic Credit
| Letter Grade | Minimum Score | Maximum Score |
| A | 90% | 100% |
| B | 80% | 89% |
| C | 70% | 79% |
| D | 60% | 69% |
| F | <60% |