This article describes how the Common Core Look-fors application for the iPad was used to help preservice early childhood education and elementary/special education teachers learn to look for and recognize student enactment of the Common Core State Standards in Mathematics' Standards for Mathematical Practice. After using the iPad application for one semester in their college course and in their internships, the pre-service teachers reported that the application helped them to understand and identify the Standards for Mathematical Practice. (Contains 2 figures.)