| Assessment Period/Time | Grade Level | M | SD | SEM | Min | Max | Skewness | Kurtosis |
| January 2020a | 3 | 525.23 | 43.04 | 0.96 | 312.00 | 643.00 | −0.33 | 0.28 |
| August 2020 | 4 | 532.76 | 46.16 | 1.03 | 342.00 | 668.00 | −0.30 | 0.17 |
| January 2021 | 4 | 545.59 | 47.26 | 1.06 | 298.00 | 683.00 | −0.47 | 0.72 |
| May 2021 | 4 | 553.55 | 49.45 | 1.10 | 306.00 | 690.00 | −0.51 | 0.63 |
| August 2021 | 5 | 556.35 | 48.40 | 1.08 | 349.00 | 691.00 | −0.47 | 0.40 |