Guess I'll kick this off then...

I make a chart on the board with Reduce, Reuse, Recycle down the left and two columns marked "should" and "shouldn't" - if you fill this in as you go through the PPT it's easier to understand. I've only used this with my high-level classes so far and it's been fine - might need dumbing down a bit for the lower ability kids.

It's best if you laminate the game boards so they can be reused and the coin slides better, too.

BTW, on the hangman slides and 3 R's slide, click the letters/words to make the box disappear.

Edit: Added an alternative coin flick game (and PPT with instructions) for low level classes.