This project aims to serve the national interest by improving curricula for teaching quantum concepts in physics and many other disciplinary contexts. Quantum science and engineering is a fast-growing, high-priority field for national security and technological innovation. Developing the workforce for it is important for America's economic future. Topics in quantum science and engineering are taught in an increasingly broad array of courses across many disciplines and educational levels. Yet it remains difficult for many students and educators to access effective, engaging learning tools. This project aims to develop and modernize a suite of research-based computer simulations, along with adaptable, field-tested teaching materials, for teaching quantum concepts. These free resources will support a broad audience of students and educators, helping prepare learners from all backgrounds for future opportunities in quantum science and engineering. This work is supported as a Level 3 project in the Engaged Student Learning track of NSF's Improving Undergraduate STEM Education (IUSE: EDU) program. PhET interactive simulations are based on extensive education research and encourage students to learn through exploration and discovery in a game-like environment. In this project, a team of investigators at the University of Colorado at Boulder and California State University, Fullerton, will redesign and modernize at least six PhET sims covering a variety of core quantum topics, i