Middle school students (Grades 5 up to 9) acquire comprehensive basic computer science knowledge. This unit fosters media literacy, problem-solving, and critical thinking. Includes interactive tasks, pedagogical guidance, and ready-to-use materials – indispensable for foundational digital education. This didactically sound teaching unit on Computer Science Fundamentals empowers Middle School students (Grades 5 up to 9) to acquire a solid foundation of basic knowledge and crucial competencies in computer science. Comprising approximately 20 pages of material, it systematically and age-appropriately introduces core topics such as how computers function, data processing, algorithms, networks, and internet usage. This comprehensively fosters digital literacy, critical thinking, and problem-solving abilities. The unit is designed for direct classroom use, covering both theoretical foundations and practical applications. The package includes a variety of proven components structured for active and sustainable learning: Didactic Introductory Text: Provides teachers with pedagogical and technical background for teaching fundamental computer science knowledge. Interactive Jigsaw Puzzle Activity: Enables students to independently explore complex computer science concepts. Subject-Specific Task: Concrete application tasks that reinforce learned concepts and promote transfer to new contexts. Single-Choice Test: For quick and effective assessment of understanding computer science concepts and terminology. Glossary: Explains all relevant computer science technical terms clearly and understandably. Summary: Concisely compiles the most important content and competencies. Didactic Teacher's Guide: A comprehensive guide for educators with lesson plans, differentiation ideas, and additional tips. Lay the groundwork for a deep understanding of the digital world for your students and sustainably strengthen their digital competencies. This material is an indispensable resource for any modern computer science curriculum.