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Edexcel D1 marking criteria questions

Discussion in 'Mathematics' started by lynneinjapan, Feb 4, 2016.

  1. lynneinjapan

    lynneinjapan New commenter

    I've just started teaching the Edexcel spec at a new school (having previously taught AQA) and have a few questions about how answers need to be presented to get full marks.

    1. On Quicksort questions, do candidates have to explicitly LIST the pivots, as on the mark schemes, or is just circling them sufficient?

    2. Matchings: the mark scheme shows final matchings as A=2, B=4, C=1, etc. Would candidates be penalised for writing the pairs without the =, i.e. A2, B4, C1?

    3. Minimum spanning trees: are they ever penalised for just listing edges without their weights? (Obviously they still have to give the correct total weight.)

    4. Chinese postman: am I correct in thinking that they have to list the lengths of the shortest possible routes AND the TOTAL for each pair of links in order to get the marks?

    Thanks to anyone who can clarify.
  2. PaulDG

    PaulDG Occasional commenter

    When you have specifics like this, go to the horse's mouth.

    Phone Edexcel.

    They're surprisingly helpful. So are the other 'Awarding Bodies' IME.
  3. lynneinjapan

    lynneinjapan New commenter

    OK, I'll try that. Will feed back with answers in case any one else has the same questions!

    Another Q to add to my list: When tracing algorithms, how fussy are they about moving down to a new line every time something changes?

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