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The New Jersey Assessment of Skills and Knowledge September 2012 Score Interpretation Manual Grades 3 to 8 which is applicable to all the parents students and private tutors at all three Math Genie abacus math for kids schools in New Jersey in the United States of America, continues on to state the following, quote “Cluster difficulty. As indicated above, inasmuch as the NJ ASK is equated at the test level only, it is inappropriate to compare cluster means or raw scores across years. Since the same cluster may vary in difficulty level from year to year, cluster performance should not be directly compared across multiple test administrations. Additionally, in any given year, not all clusters can be assumed to be equally difficult; consequently, comparing the score in one cluster to the score in another cluster is not meaningful. For each year, a useful benchmark is provided by each cluster’s just proficient mean (JPM), the mean score in that cluster obtained by students state wide with scale scores of 200. The JPM provides an index to which all students’ scores in that same cluster can be compared, as it allows one to view how a student performs relative to the profile of the borderline proficient student. Cluster reliability. All other factors being equal, the reliability (stability) of scores decreases as the number of items decreases. Consequently, the reliability of cluster scores is generally lower than the reliability of the test as a whole and, among clusters; reliability is generally lower in clusters that have smaller numbers of items. Put differently, equal differences in cluster scores are commonly less interpretable for clusters that contain fewer items. While the interpretation of scores is dependent upon the amount of potential error one is willing to tolerate. A general rule is that conclusions regarding the relative performance of individual students are risky when based upon cluster differences of one or two points, particularly for clusters containing few items. As in shades of grey, the greater the differences in the cluster performance of individual students, the more likely they are significant. Program-Level Evaluation. Scale scores. Performance by Demographic Group Reports, containing school-level and district level information, are provided to districts to help them evaluate the effectiveness of the instructional program for the full district or school population, as well as for program and demographic groups. The data facilitate cross-group as well as cross-year comparisons. Additionally, comparisons of performance, within and across years, can be drawn among different schools within the district and between school or district performance and the performance of the state or the district factor group (DFG), the latter comprised of districts at approximately the same socioeconomic level” end quote. Visit Math For Kids Problems Abacus Lessons Everyday Cool Games Private Tutors to contact Math Genie and enroll your child to improve their math ability.
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