Here’s an interesting teaching tip I found:

Take a candle into the classroom for ‘R’ and ‘L’ pronunciation practice, after the manner of Professor Henry Higgins in ‘My Fair Lady‘ (although he used it for ‘H’ practice). The candle will flutter or go out when an ‘R’ is pronounced correctly, but will remain unmoved (or should) when an ‘L’ is pronounced.

Now where can I buy some candles? (And when will the school give me some spending money? Not that candles are expensive, but don’t teachers generally get a bit of money for supplies?)