WWC assessment of "I Can Learn Pre-Algebra and Algebra" programs

Will wonders never cease! It's SO rare that any research studies ever meet WWC evidence standards that there usually isn't much to report. Here is what they say about these programs:

"One study of I CAN Learn^®Pre-Algebra and Algebra meets What Works Clearinghouse (WWC) evidence standards and four studies meet WWC evidence standards with reservations. The five studies included 16,519 eighth-grade students from middle schools in California, Florida, Georgia, and Louisiana.³

Based on these five studies, the WWC considers the extent of evidence for I CAN Learn^®Pre-Algebra and Algebra to be medium to large for math achievement."

Links to the full evaluation report are here:

http://ies.ed.gov/ncee/wwc/reports/middle_math/iclprea/