freeunderthesea BUILD NUMBER SENSE with subitizing activities you can easily use in Google Classroom! Includes ten frames, dot cards and dominoes. Use for whole group, small group, partner work or individual math centers! Great for number talks. Subitizing is recognizing how many are in a set without counting and is the foundation of number sense! Perceptual subitizing is the ability to see the number without counting. Conceptual subitizing is the ability to see sets in a given number of objects