Compare, Diagnose,
Operate
Angela Bell
CDO
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CDO is a strategy to help with revising an essay or story.
C= Compare
D= Diagnose
O= Operate
Compare
• Read the sentence.
Diagnose
• Select the best diagnose cards.
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This doesn’t sound quite right.
This is not what I intended to say.
Part of the essay isn’t in the right order.
People may not understand what I mean.
I’m getting away from my main point.
This is a weak or incomplete idea.
The problem is ____________.
Operate
• Select an operate card.
• Add: Include more information, examples, details, and so forth.
• Leave this part out: Take something (a word, phrase, sentence)
out.
• Rewrite: Say it (a word, phrase, sentence) in a different way.
• Change the wording: Rearrange information (a word, phrase,
sentence)
• Make your revision.