Standardised tests for school calculators?
My first posting so, a bit of personal background: I'm a semi-retired consulting systems engineer with a granddaughter rapidly approaching school age. Educated at St. Dunstan's College in the late 1960s, when it had a good claim for having the best school maths department in the country. Later professional education (BCS Exams) at South Bank University (then Borough Polytechnic).
I'm dispirited by what I think are the poor standards of secondary-level maths education in this country and want to give something back to good maths teachers. A current hobby-horse is the dire quality of scientific calculators at school level. Some useful papers by Prof. Harold Thimbleby, (now Univ. Swansea) are attached. Some might find them surprising (even alarming).
I would like to suggest something that might help improve things, namely a set of standardised functional tests for calculators sold for use in secondary schools. The idea is a web-based collaboration of interested individuals to devise such a set of tests. The tests should be made freely available so that any interested teachers can try them on calculators that they propose to use or recommend to pupils. Also the results of tests on individual devices could be published to spur calculator developers to do better.
Added 27/10/2016: To start the ball rolling I'm posting in this thread the results of various tests on calculators that I own. Feel free to contribute your own experiences.