What is ZPD?
Product: Accelerated Reader, STAR Reading
Platform: Macintosh, Windows
Last Updated: 2012/07/11
What is ZPD?
The Zone of Proximal Development (ZPD) defines the
readability range from which students should be selecting books in order to
achieve optimal growth in reading skills without experiencing frustration. STAR Reading software uses Grade Equivalents
to derive a student's ZPD score.
Specifically, it relates the Grade Equivalent estimate of a student's
reading ability with the range of most appropriate readability levels to use
for reading practice.
The ZPD is especially useful for students who use Accelerated
Reader, which provides readability levels on all books included in the
system. The ZPD, however, is
approximate. Success at any reading level
also depends on the student's interest and prior knowledge of a book's content. Teachers should use their professional
judgment to adjust the level of books read to match an individual student's
needs and interests.
The School Renaissance Institute developed the ZPD ranges
according to Vygotskian theory, based on an analysis of Accelerated Reader book
reading data from 80,000 students in the 1996-1997 school year.
Accelerated Reader, STAR Reading are trademarks
of Renaissance Learning, Inc. and its subsidiaries, registered, common law, or pending registration in the United States and other countries.