I love teaching pronunciation so much! Minimal pairs practise especially always seems to motivate my students, and weak forms in connected speech are fun too. Here are some ideas.
A minimal pair is a pair of words which differ only in one sound. They are a great way to help your students become more aware of their difficulties with pronunciation. For example, Spanish students often struggle with the pairs "sheet" and "seat", or "cat" and "cut". They can really improve their pronunciation by practising these pairs.