The rapidly growing literature on teamwork and collaborative problem solving suggests that these skills are becoming increasingly important in today’s education and workforce. This special issue of Journal of Educational Measurement seeks to channel the contributors’ expertise toward advances in the measurement and assessment of cognitive and noncognitive skills of individuals and teams in education. The articles in this special issue discuss the challenges and opportunities for developing collaborative assessments that cover the assessment of collaborative skills, of collaborative problem solving skills, and/or the assessment of cognitive skills through collaborative problem solving tasks. These articles combine collaborative assessment methods with advanced psychometrics techniques, such as computational psychometrics, for analyzing collaborative behavior in educational assessments; they introduce the recent progress on innovative ways of studying collaboration in education.