Common Seas' Ocean Plastics Academy provides complete lesson packages (plans, slides, activities) for KS1 to KS4, subject by subject, plus home-school science, technology, engineering, arts and maths (STEAM) activities for age 5+, infographics and photo galleries. It states that it is designed to fulfil English National Curriculum requirements, though codes are not printed. Delivered through the Encounter Edu platform.
Who made and funded this: Common Seas, a UK not-for-profit funded by foundations and grants (its separate 'Plastic Drawdown' tool is for governments, not classrooms). Encounter Edu terms apply. How to use it: the go-to for a full unit once our single lessons have got a class started. Free; link only.