References

Met WWC evidence standards

Gunn, B., Biglan, A., Smolkowski, K., & Ary, D. (2000). The efficacy of supplemental instruction in decoding skills for Hispanic and non-Hispanic students in early elementary school. The Journal of Special Education, 34, 90–103.

Additional source:

Gunn, B. Smolkowski, K., Biglan, A., & Black, C. (2002). Supplemental instruction in decoding skills for Hispanic and non-Hispanic students in early elementary school: A follow-up. The Journal of Special Education, 36, 69–79.