​Nani Teig is an associate professor at the University of Oslo, Norway. Her research focuses on inquiry-based teaching, scientific reasoning, teaching quality, and academic resilience. She integrates multilevel analyses using data from videos, surveys, assessments, and computer log files. Nani has received several awards and fellowships, including the Global Education Award, Bruce H. Choppin Dissertation Award, Young CAS Fellow, and UNESCO GEM Fellow.  Trude Nilsen is a research professor at the University of Oslo. She is a leader of the research group LEA (Large-scale Educational Assessment) in her department, and a leader of several large research projects. She also is and has been, engaged as an international external expert for IEA’s TIMSS and for OECD’s TALIS. She has received several awards, amongst others the IEA Bruce H. Choppin Memorial Award. Her research is within the fields of educational effectiveness and international large-scale assessments, with a focus on teaching quality, educational equality, school climate, and applied methodology including causal inferences. Kajsa Yang Hansen’s research concerns educational quality and equity from a comparative perspective. She tackles these issues by investigating students’ social, motivational, and cognitive factors in the contexts of their schools, changing societies and education systems. Dr. Yang Hansen also has an interest in analytical techniques for large-scale survey data, e.g., multi-level analysis, Structural Equation Modelling (SEM) and second-generation SEM.