2. Show a graded mixture of 'the good, the bad & the ugly'.  Incomplete answers are great discussion starters.

3. Specifics for the previous example:

• "This makes sense, but it is missing something...."
• "This is all true, but what if something else occurs simultaneously...."
• "This is correct, but for the reason isn't quite right...."
• "This is a great response...."

• "This has a great beginning, but there is more that could be added...."
• "This is a great answer, but to a different question...."
• "This is the right idea, but I think the person meant something slightly different here...."

• Ask the class "What part of this is completely correct."
• Ask the class "Under what circumstances would these be correct?"
• Ask the class "What word or two could be changed to fix this completely?"
• Ask the class "What is particularly good about this response?

• Ask the class "Is this true for other cases? Which?"
• Ask the class "When is this statement false? What happens then?"
• Ask the class "Is this similar to something we have done before? What?"

7. Ask students to compare responses of  "Dueling Answers" 

• Two very different answers, not obviously exclusive:
     Ask if they are exclusive
• Two obviously exclusive answers:
     Ask for a vote on which is correct
     Do some analysis
     Repeat as needed