RIMTA - Elementary Math Leaders Professional Development Materials Rhode Island Mathematics Teachers Association (RIMTA)'s Elementary Math Leaders Group, a network of elementary mathematics leaders from throughout Rhode Island, created professional development materials and instructional resources to support six core topics in Visual Models Across the K-5 Common Core, each resource looks a little different in order to meet a variety of needs. Number Sense Place Value Fractions, Number Lines Tape Diagrams Algorithms Are all available at https://rimta.wildapricot.org/Visual-Models-Across-the-K-5-Common-Core.