Pupils needing extra support

Could use the Download: data encoding template (support), which provides a table and formulae for children to work from and adapt (see Downloads); should use slide 6 of the Presentation: RFID to guide them.

Pupils working at greater depth:

Could use a three or four-stage encoding system by adding in two further columns which complete a new sum and then ‘undo’ it (they will need to think about which order the sums need to be completed in to ensure that they are successfully decoded); could try longer numbers, e.g. 16-digit codes to mimic bank cards; could try to break each other’s codes by thinking about what their partner multiplied or added to the code to create the transfer code.