If you see a problem in your school, ask yourself: what are we going to do about it? What can we do? Once you figure it out, do it! Complaining will get us nowhere.
Give opportunities for students to share their opinions on why something does or does not work (i.e. if they disagree with the city council, have them write a letter)
Let the consequences play out.If students are in charge of bringing snacks, but only bring enough for half the class, have them figure out how each student gets enough (hello math problem!)
Ask "what if" and "why" questions. Ex: why did an author use that literary device? Or, for the self "what can I change in this paper to make it sound more powerful?
Teach how to back it up with evidence! Say: when you use evidence to back up your claim, that is making a sound judgement. (Source: Sound judgement article)