Two spinners may be seen as an extension task for such pupils. The task may be approached through a combinatorial approach - pupils may be encouraged in attempts to draw grids of spinner 1 against spinner two, but this should be combined with real data collected by experiment which will reveal misconceptions about results of short runs. Informal knowledge about probability should be formalised in a final feedback session involving significant input from the teacher who might need to teach key concepts directly. These level indicators should be used in accordance with the assessment guidance given on page 16. Level four Works accurately under the direction of the teacher or other pupils.
Records results for one spinner in a clear and organised way.
Level five Works systematically and accurately. Records results for one spinner in a clear and organised way. Collects results from at least 20 spins and draws a block graph for one spinner. Collects and organises experimental data for at least 50 spins and gives experimental probabilities in mathematical terms or makes a grid of all possible outcomes for two spinners and gives theoretical probabilities. Level seven Works systematically and accurately with two spinners.