The pattern is in the Knitty archive – OpArt. I made my version for the first-born child of friends.
Longer ago than I care to remember I collaborated on a instructional for pursuit curves on PrimaryResources.co.uk.
Although they aren’t a key part of the Maths curriculum, pursuit curves shouldn’t be overlooked or dismissed as an end of term activity. To produce an accurate picture, pupils need to carefully use measuring and drawing equipment – this makes it a good way to start a measures topic.