**Movement is Magnitude** is the counting and quantity principle that refers to the understanding that as you move up the counting sequence (or forwards), the quantity increases by one and as you move down (or backwards), the quantity decreases by one or whatever quantity you are going up/down by.

For a full summary of all counting principles, read the original blog post.

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[…] Understanding that as you move up the counting sequence (or forwards), the quantity increases by one and as you move down (or backwards), the quantity decreases by one or whatever quantity you are going up/down by. Despite many believing that learning the alphabet is the same as learning how to count, our number system is much more complex than the alphabet. The letters in the alphabet are arranged in an order for no particular reason, whereas the stable list of numbers we use for measuring quantity through counting is ordered by magnitude. “The child understands that as you count forward, the quantity increases; as you move backward, the quantity decreases.” Tweet This See this animation in video format here. […]