Never help a child with a task at which he feels he can succeed.

While many traditionally taught 2nd and 3rd graders struggle with adding 3- or 4-digit numbers, Montessori preschoolers readily tackle these and other advanced math skills. Watch this video to discover the ingenious sequence of materials that enable 6-year-olds to do arithmetic into the thousands, and prepare them to master long multiplication into the millions by early elementary.