The authors describe a collaborative group-testing strategy implemented and studied in undergraduate science classes. This project investigated how the assessment strategy relates to student performance and perceptions about collaboration and focused on two sections of an undergraduate biotechnology course taught in separate semesters.

The use of assessment methods is a widely discussed topic in education. Exams that are commonly used, however, may not necessarily assess student understanding at a high cognitive level. By implementing alternative assessment methods, instructors can influence student learning. Portfolio-based assessment (PBA) is a purposeful collection of student…