Unifix cubes are a concrete representation of addition/number bonds. Building the bond with the Unifix cubes is what develops number sense. Great use for flash cards instead of looking for just memorization
Snowman Numbers This is a set of snowmen cards, numbered from and a set of tally marks, from Use to match the sets; as flash cards; for number or tally marks sequencing. If the activity works well for you, please leave some feedback.