“…Plummer -- Models / Christina Schwarz , BrianJ. Reiser , Andrés Acher , Lisa Kenyon and David Fortus -- Exploring Challenges to Defining Learning Progressions / Lindsey Mohan and Julia Plummer -- Developing Assessments for a Learning Progression on Carbon-Transforming Processes in Socio-Ecological Systems / Hui Jin and Charles W. …”