What this paper adds: Students with DLD (ages 4-16, n = 64) made significant improvement in language skills during their time at school. These results provides some evidence of the effectiveness of a language specialist school.
Ziegenfusz, S., Coughlan, A., Paynter, J., Simpson, K., & Westerveld, M. (2018). Measuring language progress in students with developmental language disorder while attending a specialist school. A retrospective analysis. Journal of Clinical Practice in Speech-Language Pathology, 20(1), 3-7.