I guess I'm unclear what the issue here is - nearly everything is embedded within closed loops so a simple question like "what did you do last night" should provide any number of loops to discuss
"I played basketball"
The more time you spend playing basketball the less time you spend on hw less time on hw worse grades worse grades more likely mom will ground you from playing basketball means less time playing bb
"I talked on the phone with my girlfriend"
The mire rime I talk to me girlfriend the more I like her the more I like her the more I want to talk to her
I went shopping
The more I buy the less money I have means the less I can buy
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If they immediately come up with a reinforcing loop prod them until you find the balancing loop that might constrain that
If they immediately come up with a balancing loop, come up with a reinforcing loop for the same system
I think any systems teacher should be able to take the answer to neely any question and through some skillful "and then what happens" or "what else does that do" etc get to a closed loop
No need to come up with the beat examples let their experience guide you and just provide the eight questions