In itself, a great prepared rally through the old town of Cologne. Unfortunately, the children didn't get their notebooks back after the points were counted, so that we all couldn't keep up with the evaluation (in particular, discussing the math puzzle orally was not a good idea). Tip: After counting the points, give the notebooks back to the students and make the evaluation more interactive and student-centered, i.e. involve them more. For example, let them read out the answers themselves.
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