This is a fantastic idea! Do you mind if I share that with my English students?
Exploiting the technique above, start with a word in the language of the audience that share phonemes with your target word. From there you essentially play something similar to Lewis Carroll's "Doublets" game from the end to the beginning. So for the word "usually" I would usually start with the city in China, "Guanzhou" and proceed as follows (excuse my poor man's phonetic spelling):
Gwan-jo
Gwan-jo
Gwan-jo
Gwan-jo
Gwan-joooo
Gwan-joooo
Gwan-joooo
Gwan-joooo
Gwan-joooo-aaaa
Gwan-joooo-aaaa
Gwan-joooo-aaaa
Gwan-joooo-aaaa
Gwan-joo-a-lee
Gwan-joo-a-lee
Gwan-joo-a-lee
Gwan-joo-a-lee
joo-a-lee
joo-a-lee
joo-a-lee
joo-a-lee
yoo-joo-a-lee
yoo-joo-a-lee
yoo-joo-a-lee
yoo-joo-a-lee
The repetition is performed until your student(s) ha(s|ve) properly pronounced the current temperoary utterance.