1. The Development of a Quadratic Functions Learning Progression and Associated Task Shells. Issue 1 (26th December 2018) Authors: Graf, Edith Aurora; Fife, James H.; Howell, Heather; Marquez, Elizabeth Journal: ETS research report series Issue: Issue 1(2018) Page Start: 1 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗