Chaudron, C. (1988). Second language classrooms: Research on teaching and learning. Cambridge: Cambridge University Press.
2.
Long, M. (1983). Does second language instruction make a difference? A review of the research. TESOL Quarterly, 17, 359-382.
3.
Nicholas, H., Lightbown, P., & Spada, N. (2001). Recasts as feedback to language learners. Language Learning, 51, 719-758.
4.
Norris, J., & Ortega, L. (2000). Effectiveness of L2 instruction: A research synthesis and quantitative meta-analysis. Language Learning, 50, 417-528.
5.
Norris, J., & Ortega, L. (2006). The value and practice of research synthesis for language learning and teaching. In J. Norris & L. Ortega (Eds.), Synthesizing research on language learning and teaching (pp. 3-50). Amsterdam : John Benjamins.
6.
Truscott, J. (1996). The case against grammar correction in L2 writing classes. Language Learning, 46, 327-369.
