This excellent teaching tool gives audio examples of the English phoneme set. By clicking in each phoneme you can hear the sound in isolation and a sample word. The advantage of this tool is that your students can use it by themselves because it is very easy. You can also find guides, useful material, popular courses and tittles. Moreover, you can watch live talks, Macmillan online conferences, talks and workshops, giving teachers training workshops. We recommended it is full of information and useful tips for you. 
Access the tool here