Four studies of
Reading Recovery® meet What Works Clearinghouse
(WWC) evidence standards, and one study meets WWC
evidence standards with reservations. The five studies included
approximately 700 first-grade students in more than 46 schools
across the United States.
Based on these five studies, the WWC considers the extent
of evidence for Reading Recovery® to be medium to large for
alphabetics, small for fluency and comprehension, and medium
to large for general reading achievement.