Ron Berger from Expeditionary Learning demonstrates the transformational power of models, critique, and descriptive feedback to improve student work. Here he tells the story of Austin's Butterfly. 1st grade students at ANSER Charter School in Boise, ID, helped Austin take a scientific illustration of a butterfly through multiple drafts toward a high-quality final product. This video is one of 27 videos that accompany Expeditionary Learning's new book, Leaders of Their Own Learning: Transforming…