2014-02-25 15:44:53 - Math Genie provides math for kids abacus lessons everyday to solve problems with cool games from private tutors and combines the ancient abacus with modern child psychology to create a unique strategy for kids to learn math.
"The New Jersey Assessment of Skills and Knowledge For Grade 4 Technical Report Dated May 2003 created and made available by the New Jersey Department of Education is significant to all the parents students and private tutors at all of the three Math Genie abacus math for kids schools in New Jersey in the United States of America, continues on to state the following, quote “Thus, one can say that a person's observed score will lie between ±1 SE of his true score approximately 68 percent of the time, or 2 SE of his true score about 95 percent of the time (p. 252). Table 8.2.1 2003 New Jersey Assessment of Skills and Knowledge (NJ ASK) Reliability Estimates and Standard
Errors of Measurement (SEM) for Content Areas and Clusters. NJ ASK Test Section. Number of Points. Reliability. Raw Score SEM. Scale Score SEM. Language Arts Literacy. TABLE 8.2.2 2003 New Jersey Assessment of Skills and Knowledge (NJ ASK) Reliability Estimates and Standard Errors of Measurement (SEM) for Dichotomously Scored Items Within Content Clusters".
"NJ ASK Content Area. Number of Points. Reliability. Raw Score SEM. Language Arts Literacy. Performance Classification. Decision accuracy provides an estimate of how reliably a test form classifies students into performance categories. It is estimated by comparing the observed score distribution for a form to a hypothetical true score distribution. The observed score distribution (also called single-form score distribution) is the actual distribution of scores for all test takers on a test form. The true score distribution is hypothetical because true scores cannot be known, although, they can be estimated. A true score is the average of the observed scores for a student obtained over an infinite number of repeated administrations of the same form. The methodology used for estimating the reliability of classification. Decision accuracy is described in Livingston and Lewis (1995) and is implemented using the ETS-proprietary computer program RELCLASS-COMP (Version 4.12)".
"RELCLASS-COMP generates a contingency table that shows the proportion of exact agreement between the two distributions. In Table 8.3.1, the cells showing exact agreement are shaded. The sum of the shaded, diagonal cells represents the estimated proportion correctly classified. The results of these analyses are presented in Table 8.3.1. For Language Arts Literacy, the estimated proportion correctly classified overall was 0.89. When the decisions were collapsed to below proficient versus proficient and above, the estimated proportion correctly classified was 0.92. For Mathematics, the estimated proportion correctly classified overall was 0.83” end quote".
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