Latin has quite a complex grammar and many mnemonics have been used in the past as a memory aid. A famous example is the rhytmic "rosa rosa rosam" which is used to teach the first declension. It was immortalised in a Jacques Brel song in 1962 and is still used today.
A cursory search reveals lists of mnemonics reproduced in textbooks as early as in Alexandre de Villedieu's Doctrinale puerorum (1199), but I can't find any mention of their use back when Latin was still a first language in much of the known world.
Is there any record of mnemonics being used to teach Classical Latin when it was still a living language?
If there is, have any survived into contemporary usage?