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by em-bee 2159 days ago
montessori teaches the basic number system by counting beads.

get a pile of beads, count them. get another pile, count them. put the two piles together, count.

they have beads that let you count up to 1000. i don't know at which point they introduce written numbers, but they certainly learn to say and use the numbers, and experience them through counting before reading and writing them.