From Education Week:
Just one program was found to have positive effects or potentially positive effects across all four of the domains in the review—alphabetics, fluency, comprehension, and general reading achievement. That program, Reading Recovery, an intensive, one-on-one tutoring program, has drawn criticism over the past few years from prominent researchers and federal officials who claimed it was not scientifically based.
Federal officials and contractors tried to discourage states and districts from using Reading Recovery in schools participating in the federal Reading First program, citing a lack of evidence that it helps struggling readers.
Thomas J. Mertz