Teach polling and interrupt handling with a complete 49-slide IB Computer Science A1.3.4 deck. Covers event detection, polling loops, interrupt service routines, context switching, interrupt storms, CPU overhead, power use, predictability, latency, security, scenario evaluation, comparison tables, IB evaluation sentence frames, assessment guidance, retrieval practice, exam-style questions, and classroom activities. Includes clear explanations, flow diagrams, worked scenarios, teacher notes, and practical activities. Suitable for IB Diploma Computer Science SL and HL, first assessment 2027.