Variability is inherent in educational phenomena. Research-practice approaches face a conundrum of how to deal with variability. It can be positive, providing evidence for effective innovation in local sites, but interferes with a goal of consistent effectiveness. Our methods for capitalizing on variation have become sophisticated, and solutions to the unwanted facets of variability are emerging. A working model for how to think about variability and setting expectations about the tolerance levels is proposed.

中文翻译：

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研究实践伙伴关系面临系统可变性的难题

可变性是教育现象所固有的。研究实践方法面临着如何处理可变性的难题。它可以是积极的，为本地站点的有效创新提供证据，但会干扰一致有效性的目标。我们利用变异的方法已经变得复杂，并且正在出现针对变异性不良方面的解决方案。提出了一个关于如何考虑可变性和设定关于容差水平的期望的工作模型。