Having finished with a whole bunch of GCSE students, both foundation and higher, I've found that they are all consistently getting less marks on the calculator paper compared with the non-calculator one. When I've tried to sort out why an immediate problem is the students can't seem to use their calculators properly. For instance, the standard form question is always badly answered, when using a calculator, as most students seem completely unable to enter the powers of 10 required in the question. Has anyone else noticed this trend? Has anyone else thought about why this may be so?