## A vertical number line makes math easier to understand Most teachers were taught to use a horizontal number line to teach concepts.  I recommend using a vertical number line because it’s easier for students to understand.

When we add and subtract, we thinking of going up or down, not left to right.  Wouldn’t that be easier to picture on a vertical number line?  After all, to most kids, adding is going up and subtracting is going down.  Kids don’t think of numbers as going from left to right.

To teacher integers (positive and negative numbers), I like to write a vertical number line from -10 to 10.  I write the positive numbers in black and the negative numbers in red.  (In a business context, red is the color for negative numbers.)  To make 0 stand out, I write it big and blue.

Having positive numbers one color and negative numbers another helps students see the difference.  Working on a vertical number line helps them see why –2+3 = 1.

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Posted in Math by Corey Green @ Mar 9, 2015