Curriculum Resources for PK-12

This nonprofit provides evidence-based reviews of instructional materials in English Language Arts and Mathematics.

From the Louisiana Department of Education, reviews are ranked into tiers by quality. The reviews also "describe the degree of alignment with [LA] state content standards."

Offers meta-analyses or other quantitative syntheses that provide "summaries of evidence on the effectiveness of programs or practices used with children in grades K-12, focusing on achievement outcomes." From the the Johns Hopkins University School of Education's Center for Data-Driven Reform in Education.

Offers systematic reviews on the effects of intervention in education, social welfare, crime & justice, and international development.
Tips: Since there aren't a large number of reviews in the Education category, browsing is a reasonable option. To find completed reviews, used the Advanced search and check Review under Type of Document:

Systematic reviews from a center at the University College London include education topics.

The " WWC identifies studies that provide credible and reliable evidence of the effectiveness of a given practice, program, or policy (referred to as “interventions”), and disseminates summary information and free reports."