Laura H. Chapman: More on the Corruption of Education by Econometric Language

Diane Ravitch's blog

Laura H. Chapman gives more examples of the distortion and corruption of education practice amd policy by econometric language.

Students are performing on grade level if their scores on a standardized test are at or above the median on a percentile scale (1-99). On a large-scale test, a score at or near the 50th percentile (the median) will usually classify a student as proficient in the skills and subject matter on the test.

Expected growth means that gain-scores of students (on tests in a single subject, such as math or art) are staying in about the same location in a distribution from year to year—below average, average, or above average. For a large number of students, the distribution is likely to resemble a bell or normal curve.

Predicted growth is an inference about a student’s future gain-score, derived from a linear regression analysis of two or more years of that…

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The National Mobilization for Equity is a coalition of organizations committed to alleviating the present staffing crisis in higher education: three-quarters of the teaching jobs in American colleges are held by underpaid, precarious and poorly-supported contingent faculty. Our long-term goal is to end contingency as the norm. The current untenable situation not only adversely affects all faculty members, both contingent and tenure-track, it also negatively impacts our profession, our students and the quality of their education.

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