Spooky House Algorithms | Year 3 Computing PowerPoint Lesson

Make coding unplugged and spooky with this visual, colourful, interactive Halloween PowerPoint for Year 3. Pupils meet the key words algorithm, program, sequence and bug, then guide a lost ghost across a grid to the treasure using precise instructions such as forward 1 and turn right. A worked example shows how to build a complete algorithm, a bug-hunt slide teaches debugging step by step, and a decomposition slide shows how to break a big problem into small parts. Loops are introduced gently, with a long way and a short way to write the same program, before pupils write, swap and debug their own grid programs in a hands-on activity. A stretch task asks them to make their program shorter and explain why using because. No computers or tablets are needed, which makes it ideal for non-specialist teachers, supply cover and Halloween week. Matched to the KS2 Computing programme of study for designing, writing and debugging programs, with a where-this-leads-next slide previewing block coding in Year 4. 17 slides in a consistent colourful design with friendly speech-bubble prompts. British spelling throughout.