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2. Australian Curriculum: Mathematics. http://www.australiancurriculum.edu.au/mathematics/curriculum/f-10?layout=1
3. Common Core State Standards: Mathematics [US]. http://www.corestandards.org/Math/
4. Numeracy for all learners. Victoria State Government. (2020). https://www.education.vic.gov.au/school/teachers/teachingresources/discipline/maths/Pages/numeracy-for-all-learners.aspx
5. National Numeracy Organisation (UK). (2020). Building a numerate nation: Confidence, belief and skills. https://www.nationalnumeracy.org.uk/sites/default/files/building_a_numerate_nation_report.pdf