You need to be able to identify the inputs, processes, and outputs for a problem - this video goes through what this means exactly.
Made for OCR GCSE Computer Science Paper 2 (J277).
Part of the 2.1 Algorithms topic: https://youtube.com/playlist?list=PL04uZ7242_M4d9A392Jiqc4P9UoaKx6Wu&feature=shared
Full Paper 2 playlist: https://youtube.com/playlist?list=PL04uZ7242_M4mI9S3BRTrkfAm3ifo-s53&feature=shared