Teaching and learning fractions is one of the most dreaded concepts in mathematics. Using a number line and fraction bars to introduce the concept of part/whole fractions is an effective strategy. "Teaching Fractions with Number Lines" is for 3rd grade teachers looking for fraction activities that is aligned to the Common Core Standards. Included in this document is a resource page of fraction bars with three number lines (fraction, decimal, percent). Fractions include halves, thirds, fourths, fifths, sixths, sevenths, eighths, ninths, tenths, twelfths, and sixteenths. Also included is three activities: Finding Equivalent Fractions, Comparing Fractions, and Representing Fractions on the Number Line.