3 balls in a row pattern- NRICH

https://www.youtube.com/watch?v=Kjj7l2t5_Kc&list=PLDcoOhEp7dDK9xAPUedPQG4CZu2pMg9G7 Watch Zero the Hero Explore: Make a race track.  Place speed signs using numbers 10-100 on to your race{...}

Read ten is a crab. Focus on just up to ten and how the numbers are made up e.g. 10{...}

Launch: What is a pattern? What makes it a pattern? What can you do patterns with?   Make a pattern{...}