I don't think this is a good idea, Stephen! Five to nine year olds with a bunch of clothespins they grab off each other.... maybe you have better classroom management skills than I did!
I"d relax about it.... bug em to speak English (that might be a better way to put it than no speaking Chinese) but don't let it bug you : )
I'd be more likely to use a pure reward system... if everyone speaks only English today, we can....fill in the blank. Then I would have a bit of selective hearing... if they did a really good but not perfect job, we'd still get the reward.
I could also be all wet. I haven't taught English/ esol in another country, just ESL and elementary ed here in the states.
* I'd probably leave out the 'only' part, and find something I really could stick to.... but if every child participated and spoke English, I'd be pretty happy. You might not be pushing the gregarious ones as hard as you could, but you'd be picking up the shy ones.... how many kids do you have in class at a time?
When a class has loved me, I've been able to manipulate behavior ( D !) with guilt... I know I know, but it works great for me. I would show how left out I feel when people don't speak English, make them try to translate what they said into English so I can understand/ have fun too.... these are the gentle teacher's bag of tricks ; )
I can pull off 'tellme tellme tellme I want to know too!!!'
Also, seems like Pass the paper would work wonderfully. Game i invented and now which has all kinds of different versions around the world.
But don't push students too much. Note that they should all go at their own pace. Many students will only speak once they have enough comprehensible input and time working in English. They need gas in the tank. Speaking is a result of listening/reading. Be patient but keep the focus on communication.
Hope this helps!
We're still a team, David! :D
I still have the easy part : )