Dr. Montessori demonstrated that if children have access to concrete mathematical equipment in the early years, they can easily and joyfully assimilate many number facts and skills.
Specially designed concrete materials are used, these represent all types of quantities and allow children to become interested in counting by touching or moving the items around as they enumerate them. By combining this equipment, separating it, sharing it, counting it, and comparing it, they can demonstrate to themselves the basic operations of mathematics.
At Little Einstein children never sit down to memorize addition and subtraction facts; they never simply memorize multiplication tables. They learn these facts by actually performing the operations with concrete materials. The concrete experiences allow greater concentration and ensure the children gain a real understanding of what each operation means. Our classroom is full of materials in multiple quantities which can be used for numeration, adding, subtracting, multiplying, dividing and working with fractions, that each child has an individual access to them and as early as 6 years old, children can learn numbers up to 9,999 along with a solid understanding of the Decimal system.