Which assessment method uses a scaled set of criteria to define acceptable and unacceptable performance?

The method that employs a scaled set of criteria to define acceptable and unacceptable performance is indeed a rubric. A rubric provides a clear framework for assessment, detailing specific criteria that outline different levels of performance, which allows educators to evaluate work consistently and fairly.

Rubrics typically include descriptors for various levels of achievement, often represented numerically or with qualitative terms such as "exemplary," "proficient," "basic," and "needs improvement." By using a rubric, both the assessor and the student gain a clear understanding of the expectations, making it easier to identify areas of strength and opportunities for growth. This structured approach enhances transparency in the evaluation process and provides students with targeted feedback to improve their performance.

In contrast, checklists tend to be more simplistic, focusing on the presence or absence of specific items rather than offering a graded scale of performance. Portfolios showcase a collection of a student's work and reflect their progress over time but do not define performance levels directly. Observations involve assessing behaviors or interactions in real-time but lack the systematic criteria that a rubric provides for performance assessment.