Check out the climate change class activities and other resources from Practical Action and School Science, WWF‘s resources on protecting the planet, and primary-level resources on food security and sustainable development at the STEM learning site.
Armed conflict and militarism
Oxfam has produced lesson plans for 14–17 year olds on armed conflict, the arms trade, how positive change happens, militarism, and campaigning.
Human rights and justice
Educate Together and the Equality and Human Rights Commission both have resources on human rights.
Budget for a Safer World
And here’s a lesson plan covering a wide range of global issues, produced by the Quakers.
Peace Education Network
The Peace Education Network has a wide range of resources for all ages.