Common Core: Be Wise-Subitize, Developing Instant Recognition of Quantities. The ability to subitize, or instantly recognize small arrangements of items, is a foundational math skill. A few minutes of highly engaging practice each day is all it takes to develop this skill. This group of cards includes dice patterns, tally marks, hearts, and finger patterns. Includes instructions for how to use the cards in the classroom. Great for whole group or small group instruction. $