The Spache readability formula is meant to score materials intended for use at the kindergarten level through third grade.
It is a vocabulary-based readability formula, matching its own list of words to the words in the material being evaluated, to determine the appropriate grade level. In addition, the formula factors in the total number of words and sentences, arriving at an average sentence length.
Both
Readability Calculations and
Readability PLUS support two versions of the Spache formula - one developed in 1966, and a revised version dated 1974. You may apply either (or both) to your materials.
