# Number Lines

Number lines can be used to develop understanding of number and help to develop competence and confidence for mental calculation at all stages.

One issue with standard number lines is the student’s lack of understanding as to what the line actually represents.
Teachers need to start with a more concrete number line where the quantities are evident. In Kindergarten, they construct quantity numberlines with materials – each stage of the number line is fully represented.

Quantity Number Line

Later, they should move to a number line where the actual squares are numbered, not the lines.

With a large number line like the one above, students can place counters on the actual squares. Later on, they move to number the end of the squares, which equates to standard number lines they use later. These number lines are also good for showing addition facts. This helps set the stage for open number line work later.

 1 -10 concrete number lines Two per page, designed to be printed on ledger sized paper. These are much larger numberlines for Kindergarten and early grade 1. Counters, such as teddy bear counters, can be placed directly on the squares. 1 – 20 concrete numberlines Four per page, designed to be printed on letter paper for student use. 1 – 50 concrete number lines Four per page, designed to be printed on legal paper for student use. Commercial Number Lines (Spectrum Educational) Spectrum offers heavy duty numberlines designed for teacher demonstration. Estimating Number Line Smartboard Number Lines The three types of number lines above pasted in a three page notebook file.