These larger primary 1 – 12 dice are perfect for young students for subitizing, counting, comparing numbers, using with number lines or rulers (especially effective when used with our Foldable Rulers MN36). We also pair them with 2F adding and subtracting dice for early operations. THEY ARE MEANT TO BE PAIRED with DC18 12-sided spotted dice. These two types are color aligned – meaning that 6 spots green match 6 numeral in green. Your students will develop subitizing quickly with this feature.