| Confounder | Considered | Precision | Imbalance | Adjustment |
| Gender | □ | □ | □ | □ |
| Age | □ | □ | □ | □ |
| Grade level | □ | □ | □ | □ |
| Socioeconomic status | □ | □ | □ | □ |
| Base line achievement | □ | □ | □ | □ |
| Local education spending | □ | □ | □ | □ |
| Unobservables12 | □ | Irrelevant | □ | □ |
| Other: | □ | □ | □ | □ |
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