Group work is a growing trend in schools, as educators seek more complex, more authentic assessment tasks and assign projects and presentations for students to work on together. The Common Core State Standards call for increased student collaboration in various subject areas, and collaboration is considered one of the 21st century skills that students need to master in order to succeed in school and beyond. Many teachers, though, are uncomfortable giving group grades, which may or may not actually reflect an individual student's learning. How else to proceed? Assessment expert Susan M. Brookhart offers practical advice, strategies, and examples to help teachers understand the following: