A curriculum-aligned double-sided A4 sheet, designed to support the delivery and retrieval of computer networks at Key Stage 3 and beyond. It introduces students to fundamental networking concepts such as networks and their purpose, types of networks including LAN and WAN, basic hardware like routers and switches, data transmission, and common network protocols, all explained in clear, age-appropriate language. The resource is structured to build understanding progressively, combining theory with real-world examples to help learners relate abstract concepts to everyday technology such as the internet, school networks, and mobile devices. It is suitable for classroom teaching and independent learning, and supports the development of computational thinking, digital literacy, and foundational knowledge required for progression to GCSE Computer Science.