This activity helps junior high school students see how the numbers they have learnt before, eg. whole numbers, natural numbers, integers, fractions (rational numbers), are related and are distinct from irrational numbers.
Where do decimals which are terminating, non terminating but recurring or non terminating and non recurring lie in the rational and irrational number classification? Find it here.
This copy of the original includes sliders to allow sequence of presentation of the classification
