| | Re: Students don't remember correct pronunciation
Sometimes getting the words into sentences helps. It's often difficult to pronounce the one word but students get better when using the word in combination with other words.
Another option is to record them and let them listen to themselves to draw attention to the vast difference.
I'm not a big proponent of strict pronounciation practice. I only correct pronounciation if it impeeds meaning. I also feel pronounciation improves with fluency. So, I would say move on and hope that over time with increased fluency you will see improvements in pronounciation.