I created this worksheet about 4 years ago and have not stopped using it since, it has really proved valuable. When teaching spoken English, pronunciation is very rarely something that makes it onto paper, meaning that students cannot so easily revise at home what they have learnt in class.
I have compiled the most problematic sounds for learners of English who have a European language as their mother tongue. Should you wish to have something similar with other problematic phonetic sounds, just let me know and I will happily put something together!
This worksheet is all colour-coded to ease the students into good pronunciation, and the phonetic symbols are used throughout.
I hope this will be as useful to you as it is to me.