The Hardest Question to Write for Diagnostic Questions?

When you test the question ou you can write ha question thing, oh, this is a great question. But then you ask the kids and do a bit of digging, you think ll actuallyhav miss something. The thing i find the hardest is writing questions that kids can't get right while still holding a misconception,. I'l give you an obvious example from maths. And i wonder if this is truei in your subject. There's also something else, actualy i want to say about multiplecose questions coming back to the borgs and retrieval induced forgetting. So basically, there is information that we teach that is either background contextual, or like that story about the tower