Websites that I have used are below:

https://www.nationalnumeracy.org.uk/what-numeracy/why-numeracy-important

https://www.numeracyninjas.org/

https://ttrockstars.com/

https://www.piximaths.co.uk/numeracy

http://www.mrshowardsnumeracynetwork.com/

https://www.missbsresources.com/blog/numeracy-resources/

https://corbettmaths.com/5-a-day/gcse/

https://formtimeideas.com/numeracy

https://b28mathstutor.co.uk/clueless-about-calculators/

https://education.casio.co.uk/calculators/classwiz-product-range/