One of my favourite end of term lessons is a Plausible Estimation Quiz. I've written about it on the NCETM website, and there is a spreadsheet there to download for scoring too.
In principle it is a quiz, where every answer is a number. Each round is 5 questions, with (ideally) all the answers in that round being the same order of magnitude. At the end of the round all 5 answers are added, and that number is the teams submitted score. The difference between the real answer, and the submitted answer is worked out, and then points awarded according to who is closest.
Usually I use Wolfram|Alpha to find answers, for random questions that pop into my head, either as I'm planning, or as I'm actually doing the quiz. Frustratingly I don't have a record of questions I've asked! I'd like to harness the power of twitter to get more questions.
1. Please suggest some questions! If you have the answers too, so much the better.
Click here to Launch the Form
2. Feel free to use it yourself. Click here to access the questions.
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