I first created these cards back in 2012 when my then 5 year old was struggling with number recognition. Over the years these cards have been added to so they include standard form, expanded for for teen numbers, word form, ten frames, base-ten images, and subitizing dots. There are now 142 cards in the set.
The cards can help your youngest mathematicians recognize, order, match, computer, compare, and more with numbers 0-20. The cards can easily be used to differentiate activities for youngest mathematicians.