* Scale Scores: These are numerical scores on a scale specific to each subject and grade level. Higher scale scores indicate better performance. There's no fixed maximum number that represents "perfect" as the scales vary.
* Performance Levels: These categorize student performance (e.g., Advanced, Proficient, Basic, Below Basic). Achieving the highest performance level (usually "Advanced") would be considered the best possible outcome, but it's not a numerical perfect score.
In short, there's no single number you can point to and say that's a perfect PSSA score. The best result is achieving the highest performance level for the specific test taken.