I have a theory that second-hand memory tricks obscure learning. I believe that memory tricks are one individual's way of encoding information in their brain, which is not necessarily compatible with another individual.
This means the student will have to decode the memory trick, understand the "unzipped" contents, and then re-encode it in their own mind.
An example is AN OIL RIG CAT (in Chemistry) - although it makes sense to me now, I and many other Chemistry students would agree that redox is a very difficult subject filled with many back and forth confusions because of poor teaching conventions like these.
I think students should be given the proper respect as to learn the actual material, not some dodgy memory technique.
What do you think?