The Fraction Activities and Assessments for Conceptual Teaching (FAACT) instructional program is designed to support teachers’ insights into students’ conceptual understandings of fractions. The overall program goal is to foster a deep conceptual understanding of fractions as quantities for students with LD and math difficulty. FAACT is designed from validated learning trajectories, which consist of a learning goal, developmental stages of thinking, and activities designed to explicitly promote the stages of thinking. The program also includes prompts for teachers to use to support students’ thinking as they solve problems. Finally, talk moves are included for teachers to use to facilitate conversation among students as they work in small group intervention settings.