Further reading
Orange drink problem and solution: https://nrich.maths.org/ 2420/ note [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)]
Golden ratio activities: https://nrich.maths.org/ 7668
The online Cuisenaire ‘environment’ can be found here: https://nrich.maths.org/ 4348
There are a range of mathematical problems relating ratio and proportion to STEM applications here: https://nrich.maths.org/ 9003