Watch all of this.
And then do it in class. It can be extremely useful. The key is to make pronunciation a physical activity, so that when the student makes a mistake, you can point to the sound they made on the chart, and they can see the sound they're aiming for, and know exactly what to do to their mouth to alter it (since it is so logically laid out). If you have a chart in your class at all times, you can refer to it at any point to fix a pronunciation error on the spot, and work pronunciation practice into other activities. My school has one in the corner of every white board, and I'd now hate to teach without it.
- For Teachers