WWF-UK are offering free online live lessons (classes at home, school or mixture) on a variety of topics covering primary science and geography curriculum points:
Book online here https://www.wwf.org.uk/get-involved/schools/calendar
Saving our Living Planet – the importance of biodiversity and steps we can make to help protect our planet
Penguins and Polar bears – how animals are adapted for polar climates and the impacts of climate change on our polar regions
Threats to nature: illegal wildlife trade: what is the illegal wildlife trade, why it is a problem and what can we do about it?
Conservation Solutions: ecosystem connections and wildlife conservation solutions in Kenya and Tanzania