Terminology 

  Copies (refers to the number of unit fractions in 1 whole)

  Equivalent fractions (fractions that name the same size or the same point on the number line) 

  Fraction form (e.g., 1 3, 2 3, 3 3, 4 3) 

  Fractional unit (half, third, fourth, etc.)

  Non-unit fraction (fraction with numerator other than 1) 

  Unit form (in reference to fractions, e.g., 1 half, 2 thirds, 4 fifths)

  Unit fraction (fraction with numerator 1)

  Unit interval (the interval from 0 to 1, measured by length)