Senior Researcher, Stanford Graduate School of Education, Stanford University; Author, Academic Conversations: Classroom Talk That Fosters Critical Thinking and Content Understandings (2011), Building Reading Comprehension Habits in Grade 6-12 (2010) and Building Academic Language: Essential Practice for Content Classrooms (2008); Co-Author, The K-3 Guide to Academic Conversations: Practices, Scaffolds, and Activities (2017)