EncounterEdu (formerly Digital Explorer) have produced some excellent resources over the years - I know because I wrote some of them back in the day. One of them even won a GA Award.
They have now launched a new free resource.
The resources have been created in collaboration with the team behind the Convex Seascape Survey.This comprehensive unit aligns with the KS3 geography programme and introduces important aspects of the ocean and science. Topics include the carbon cycle, causes, evidence, and impacts of climate change, ocean biodiversity and its protection, alongside intersections of human and physical geography through mapping, ecosystem services, and coastal livelihoods.
With the ocean covering 70% of the Earth's surface, absorbing over 90% of excess heat from global warming, and the source of livelihoods and food for billions, this unit provides students with an engaging journey into one of the most important issues of the 21st Century.
Here are the 9 units that are included in the unit.