Common Cartridge is a technical standard designed to enable the seamless packaging, distribution, and interoperability of digital learning content and assessments across various educational platforms. It defines a structured format that encapsulates resources such as HTML files, multimedia, quizzes, and metadata within a single ZIP file, adhering to a single manifest file that describe the content and how to consume it. This allows content creators, publishers, and institutions to export and import course materials efficiently between Learning Management Systems (LMS) and other tools, ensuring consistent rendering and functionality. By supporting features like rich media integration, assessment interoperability, and metadata for discoverability, Common Cartridge enhances the portability and reusability of educational resources, making it a vital standard for streamlining content management and delivery in digital learning environments across Europe and globally.