I usually use phonetic emphasis when talking with them. I think this is especially essential with English (as opposed to German or Swedish) because the pronunciation in English makes literally no sense - there isn't much of a real relationship between our letters and their alleged phonetic companions.
Have you used the International Phonetic Alphabet?No, I'll take a look at it.
I'm working with 20-something kids, two guys and a girl, both come from refugee camps in Thailand (originally Karen-Burmese and Burmese) within the last two years. Their reading comprehension is much better than their spoken English and sentence composition.