"To start with the list of topics under the statistics heading showed a strong mathematics influence. This may reflect the state of the curriculum in the United

"To start with the list of topics under the statistics heading showed a strong mathematics influence. This may reflect the state of the curriculum in the United States, but in no way reflects current understanding of how statistics is best understood." Anyone producing teaching materials will tend to use the existing school or university syllabi as a guide. Search YouTube for a mathematical topic and include 'GCSE' in the search term to see a pretty good mapping of the range of teaching styles in UK/England and Wales (Scotland has a different system). I think anyone here thinking of authoring materials for use by school age students should break the topics down as small as they can (high 'granularity'). That will allow teachers to include them in different programmes, and to shop around for different approaches.