Achievement Effects of Four Early Elementary Math Curricula (IES cluster RCT) - Agodini, R.; Harris, B.; Seftor, N.; Remillard, J.; Thomas; M. (Mathematica for IES) (2013)
rct; evidence grade B

Curriculum Reform in the Common Core Era: Evaluating Elementary Math Textbooks Across Six US States - Blazar, D.; Heller, B.; Kane, T.; Polikoff, M.; Staiger, D.; et al. (2020)
quasi-experiment; evidence grade C

Mathematics Curriculum Effects on Student Achievement in California - Koedel, C; Li, D; Polikoff, MS; Hardaway, T; Wrabel, SL (2017)
quasi-experiment; evidence grade C

Large-Scale Evaluations of Curricular Effectiveness: The Case of Elementary Mathematics in Indiana - Bhatt, R; Koedel, C (2012)
quasi-experiment; evidence grade C

Assessing Impacts of Math in Focus, a "Singapore Math" Program - Jaciw, AP; Hegseth, WM; Lin, L; Toby, M; Newman, D; Ma, B; Zacamy, J (2016)
rct; evidence grade B

WWC curriculum labels invert the evidence: Everyday Mathematics ('potentially positive') vs Saxon ('mixed') - What Works Clearinghouse intervention reports (2015; 2017) (2017)
critique; evidence grade D

Choosing Blindly: Instructional Materials, Teacher Effectiveness, and the Common Core - Chingos, M.; Whitehurst, G. J. (2012)
review; evidence grade D

Mathematics Mastery (Ark): EEF primary and secondary cluster RCTs - Jerrim, J.; Vignoles; A. (independent evaluators) (2015)
rct; evidence grade B

Mathematics Learned by Young Children in an Intervention Based on Learning Trajectories: A Large-Scale Cluster Randomized Trial - Clements, DH; Sarama, J; Spitler, ME; Lange, AA; Wolfe, CB (2011)
rct; evidence grade B

Fadeout in an early mathematics intervention: Constraining content or preexisting differences? - Bailey, DH; Nguyen, T; Jenkins, JM; Domina, T; Clements, DH; Sarama, JS (2016)
longitudinal; evidence grade B

Predicting Persistence and Fadeout Across Multi-Site RCTs of an Early Childhood Mathematics Curriculum Intervention - Watts, TW; Botvin, CM; Bailey, DH; Hart, ER; Mattera, S; Clements, DH; Sarama, J; Farran, DC; Lipsey, MW (2026)
meta-analysis; evidence grade B