Hi Derek, in your explanation of behaviourism, the students would participate in behaviours such as recycling or composting that are in line with sustainable action in order to integrate their own lives into learning about climate change. In the cognitivist approach, the learners would recall the difference between a pot that boils with the lid on versus the lid off to use it as an analogy for what climate change is. Your last approach, constructivist, would allow the learners to use their own inferences from an experience to then learn how climate change works: the thermometers in two different jars. 

Thanks for your post; it helps me decipher the differences between these 3 approaches! Take care, Sam.