Effectiveness of L2 Instruction: A Research Synthesis and Quantitative Meta-analysis - Norris, JM; Ortega, L (2000)
meta-analysis; evidence grade C

Thirty-five years of ISLA on form-focused instruction: A meta-analysis - Kang, EY; Sok, S; Han, Z (2018)
meta-analysis; evidence grade C

Thirty-five years of ISLA on form-focused instruction: A methodological synthesis - Sok, S; Kang, EY; Han, Z (2018)
review; evidence grade C

Interactions Between Type of Instruction and Type of Language Feature: A Meta-Analysis - Spada, N; Tomita, Y (2010)
meta-analysis; evidence grade C

Implicit and explicit instruction in L2 learning - Goo, J; Granena, G; Yilmaz, Y; Novella, M (2015)
meta-analysis; evidence grade C

The Effectiveness of Corrective Feedback in SLA: A Meta-Analysis - Li, S (2010)
meta-analysis; evidence grade C

ORAL FEEDBACK IN CLASSROOM SLA - Lyster, R; Saito, K (2010)
meta-analysis; evidence grade C

A Meta-Analysis of Extensive Reading Research - Nakanishi, T (2015)
meta-analysis; evidence grade C

Learning a Language Through Reading: A Meta-analysis of Studies on the Effects of Extensive Reading on Second and Foreign Language Learning - Sangers, NL; van der Sande, L; Welie, C; Dobber, M; van Steensel, R (2025)
meta-analysis; evidence grade C

TBLT implementation and evaluation: A meta-analysis - Bryfonski, L; McKay, TH (2017)
meta-analysis; evidence grade D

Krashen's Monitor and Occam's Razar - Gregg, KR (1984)
critique; evidence grade D