Diphthongs
I hear an intermediate learner say: 'I didn't find (pronounced / f i: n d /) it anywhere'.
• I make a column with /ai/, drill 'find' and my students give me 'fight', 'bike', 'buy', 'eye','my', etc. for the sound.
• I accept these without writing them and then encourage students to think of other words spelt like 'find'. I get 'mind' and 'kind'.
• There may be only one or two for any given pattern. If I have thought of any other words myself I add them to the column, ensuring that they are not obscure words or too high for this particular level (in this case I might choose to introduce 'bind' and 'grind', but probably not 'rind' or 'hind').