Useful links:
https://www.topmarks.co.uk/maths-games/hit-the-button
https://uk.ixl.com/math/year-3/round-to-the-nearest-ten
https://www.topmarks.co.uk/maths-games/measuring-in-cm
https://www.bbc.co.uk/bitesize/topics/z82hsbk/articles/zg8q2hv
https://www.english-heritage.org.uk/members-area/kids/prehistoric-england/stonehenge-facts/