Latest Numberphile video using dominoes to explain how computers do addition: Domino Addition
Dan Meyer of the well-know dy/dan blog has produced a fantastic investigation about understanding exponential growth. Check out: Domino Skyscraper
With pupils on the lower end of the attainment spectrum I like to teach calculation of the highest common factor of a pair of numbers by the method of writing out the factors of each number, highlighting the common ones and then choosing the highest. I find this more successful than teaching them to use prime factorisation. Whilst this has...