This course focuses on the fundamental aspects of using manipulatives to explore mathematical concepts. A variety of problems and activities bridge the concepts of arithmetic to the properties of mathematics. In the course, participants use available technology in a hands-on laboratory for exploring realistic and interesting real-world mathematical situations. This course focuses on the use of manipulatives in grades K-12. Students move from the concrete level with manipulative to the connecting and abstract levels. Topics include place value, addition, subtraction, multiplication, division, fractions, decimals, percent, measurements, Geometry, logic, probability, problem-solving, estimation, Algebra and graphing. Mathematics as communication will also be discussed. Participants have the opportunity to discuss and modify the activities for their particular grade level. Current developments in the NCTM Standards and the Common Core are highlighted, offering new materials and technology to enhance mathematical instruction.