Final answer:
A good score on the I-Ready Diagnostic is typically one that places a student in a higher percentile, such as above the 80th percentile, which indicates performance better than the majority of peers. Benchmark scores range from low (400) to advanced (625), with higher scores demonstrating stronger performance.
Step-by-step explanation:
Understanding what constitutes a good score on the I-Ready Diagnostic involves looking at benchmark scores and percentiles.
For instance, if your daughter scored better than 80 percent of students in her grade in math and better than 76 percent in reading, she would be in the upper quartile for her age group. In a typical percentile ranking, this indicates very good performance, as the majority of students might score within a mid-range, with smaller numbers achieving at the very high or very low ends.
Benchmark scores usually range from a low of 400 to an advanced level of 625. A score that places a student in higher percentiles, like the 90th percentile or above, is indicative of a strong performance in relation to peers.
Looking at different contexts, such as international benchmarks where average scores provide insight into the educational quality across countries, we see varying levels of achievement. For example, the United States averages a score of 515, which passes the intermediate benchmark but falls short of the high benchmark, suggesting there is room for improvement despite being a developed country.
Comparatively, scores from Japan, Hong Kong, Taipei, South Korea, and Singapore surpass the high benchmark.
When evaluating what a good I-Ready Diagnostic score might be, it's crucial to consider the context of the scores—both the percentiles relative to other students and the benchmark scores that indicate different levels of achievement. This approach allows for a more nuanced understanding of a student's performance.