WWF-UK's 2019 pack for 7–11s includes a teacher handbook (PDF), activity sheets, an assembly plan and a poster. It is written to the English National Curriculum for KS2, although codes are not printed on the page. Still current and solid; a good second lesson after our ages 8–11 plan.
Who made and funded this: WWF-UK, a conservation charity funded by public donations, grants and corporate partnerships. How to use it: download the handbook PDF from the page; use the assembly to launch a school-wide Swap Challenge. Free; all rights reserved; link only.