Computing has become an integral part of the practice of in modern science, technology engineering, and mathematics (STEM) fields. As a result, the STEM+Computing Partnership (STEM+C) program seeks to integrate the use of computational approaches in K-12 STEM teaching and learning and understand how this integration can improve STEM learning, engagement, and persistence. Computational Thinking (CT) is a relatively new educational focus and a clear need for learners as a 21st century skill. This proposal tackles this challenging new area for young learners, an area greatly in need of research and learning materials. This project will develop integrated STEM and CT modules for grades 1-6 that follow new Massachusetts standards for Digital Literacy and Computer Science. They will partner with the Massachusetts Department of Elementary and Secondary Education (ESE) for the development and implementation. There are almost no curriculum materials and accompanying assessments developed and tested for CT in this grade band.