Come up with a soil order mnemonic device, share it with your discussion group, and then reply to the one you think is most memorable.
Here are the twelve soil orders (in no particular order):
Aridisols, Alfisols, Entisols, Vertisols, Gelisols, Inceptisols, Ultisols, Oxisols, Mollisols, Andisols, Spodosols, Histosols
If you've never made a mnemonic device before, take a gander at the Wikipedia page for Mnemonics (Links to an external site.)
Paying particular attention to the Types section. You're welcome to make whatever type of mnemonic suits your fancy - including musical or visual ones.