This chapter relates the classroom experiences of 44 teachers across the United States, implementing Investigations in Number, Data, and Space, an elementary school mathematics curriculum. These teachers participated in a “tryout” of Investigations for the Interactive Whiteboard with their students. Investigations for the Interactive Whiteboard was developed in collaboration by Pearson, TERC, and SMART Board. The teachers’ reactions showcase how the use of this technology enhanced the teaching and learning of mathematics. These vignettes illuminate the essence of Common Core Standards for Mathematical Practice (CCSSI, 2010), which describe how students should engage with the mathematical skills and concepts of the Common Core Content. The use of the interactive whiteboard engaged all students, motivated them to participate beyond their norm, allowed modeling of the mathematics which opened access to all students, and encouraged students to explain, argue, and defend their ideas while listening to and critiquing others, the essences of the Standards for Mathematical Practice.