@futurebird ...then during the walk-around time, have them "ask three before me" so they can practice fixing each other's errors. I also like your idea (and should do more of it myself) of giving them code with errors as a warm up, and asking them to think about how to fix.

@futurebird Not much to add you haven't already thought of, but I agree with a lot of what you said and feel your frustration. If I need to keep going with the instruction like in your example (turning into a function next), I would tell the students with errors to shift to copying the new stuff down as notes, so they don't compound multiple errors if they continue to try coding along with me, ...