Complete Pearson Edexcel IAL Computer Science Unit 1 (XCP01) pack. 14 full lessons, mock exams and revision, fully spec-mapped and ready to teach. Everything you need to teach the whole of Unit 1: Principles of Computer Science for the new Pearson Edexcel International Advanced Level specification (XCP01), first teaching September 2026. What’s included: 14 complete lessons, each with a slide deck, student worksheet, homework, and full answer versions. Topics cover the stored-program concept, von Neumann architecture, CPU registers and memory, the fetch-decode-execute cycle, memory hierarchy, data transmission, the operating system, multitasking, interrupts and process management. Two full mock exam papers with complete mark schemes. A full revision pack: knowledge organisers, retrieval-practice grids, a spaced-retrieval schedule, and a glossary with command words. Why teachers choose this pack: Fully mapped to the XCP01 specification, lesson by lesson. Built on evidence-based teaching methods including retrieval practice and spaced learning. Designed to a professional, accessible standard. Editable and print-ready, so you can add your own school logo and adapt as needed. Also available: Unit 2 (Practical Programming) and the complete Year 12 bundle, which includes both units plus the scheme of work at a saving. About the author: These resources are created by a qualified Computer Science teacher with a BSc (Hons) in Computer Science, who has taught OCR, AQA and Pearson Edexcel specifications at A Level, GCSE and iGCSE, in British schools in England and, more recently, in international schools. That breadth means every pack is classroom-ready, exam-focused, and accurately aligned to the specification, saving you hours of planning. Every resource is personally reviewed and checked by the author before it is published, to ensure accuracy, quality, and specification alignment. Note on creation: these resources were produced with the assistance of AI tools and have been carefully reviewed and edited by a qualified Computer Science teacher to ensure accuracy and alignment with the specification.