Editing Subitizing (section)

===Twentieth century teaching tools===
{{Unreferenced section|date=July 2019}}
The idea of instant recognition of quantities has been adopted by several pedagogical systems, such as [[Montessori]], [[Cuisenaire]] and [[Zoltan Paul Dienes|Dienes]]. However, these systems only partially use subitizing, attempting to make all quantities from 1 to 10 instantly recognizable. To achieve it, they code quantities by color and length of rods or bead strings representing them. Recognizing such visual or tactile representations and associating quantities with them involves different mental operations from subitizing.