What type of assessment involves evaluating a collection of work products over time?

Portfolio assessment is a method that involves evaluating a collection of work products created by a student over a period of time. This type of assessment allows educators to gather a comprehensive view of a student's skills, knowledge, and progress by analyzing various artifacts, such as essays, projects, artwork, and other relevant materials.

By focusing on a student's body of work, portfolio assessment can highlight growth and development, provide insights into a student's learning process, and allow for reflection on both strengths and areas for improvement. It encompasses a range of items that may reflect different learning styles and abilities, making it a holistic approach to assessment.

Standardized testing typically involves assessing students against a uniform set of criteria, which does not allow for the personalized insights that a portfolio can provide. Observation assessment focuses on witnessing student behaviors and actions in real-time rather than analyzing collected works. Project-based assessment evaluates students based on specific tasks or projects but doesn't necessarily compile a diverse array of work over time, as is the case with portfolio assessment.