I'm teaching English (primarily speaking and listening) to over 40 students in my hometown.
And here are 2 things I've learnt:
1. Tongue Twisters are extremely effective.
The majority of my students struggled with pronunciation.
So I taught them the correct pronuciation followed by many tongue twisters.
Due to the rigorous use of a specific sound in a typical tongue twisters,
students remember the pronunciation almost perfectly.
Thus, after a practice, words with similar pronunciation are no longer
problems for them.
2. Tongue Twisters are fun:
Students love it and I think most of us do.
It's fun to read, listen and play with.
So, I think training with tongue twisters is a wonderful to upgrade your pronunciation while
having some great fun.