A new study has developed a novel way of evaluating and improving VAMs. By taking data from Boston schools with admissions lotteries, the scholars have used the random assignment of students to ...
Optically smooth surfaces A 3D printing method called blurred tomography can rapidly produce components with commercial-level optical quality, such as this microlens array. (Courtesy: Daniel Webber, ...
In recent years, 14 states in the U.S. have begun assessing teachers and schools using Value-Added Models, or VAMs. The idea is simple enough: A VAM looks at year-to-year changes in standardized test ...
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