Assess your students on their subitizing skills. Are they perceptual or conceptual? Use with dotted cards printed off on card stock paper for durability. Show students dotted cards one at a time only for a few seconds each. Record student responses. If students can look at the card for only a few seconds and are able to tell you the number the dots represent, they are conceptual subitizers. This means they are able to look at the dots as pairs, such as 4 and 3 and tell you there are 7 dots. This skill is essential for further math such as addition and subtracting.