Useful for any two-class or compare contrast and rank topic.
Have been teaching about animals, insects, spiders, zoos, etc.
After establishing vocabularies (i.e., specific animals, etc.), set them up into a (numbered) hierarchy. E.g., cheetahs eat ostriches, zebras, fight cheetahs, wolves eat zebras, giraffes fight wolves, etc.; or: people eat animals, animals eat spiders, spiders eat insects, insects eat fruit.
Use flash cards (randomly drawn) or dice to pit one class of animals against another for competing teams.
Cue prompt/phrase as winning answer.
A lot of fun.