You may find the research papers and links below to be of interest for further study.
Developmental vocabulary checklists
MacArthur Bates Communicative Development Inventories - CLEX website:
Down Syndrome Education vocabulary checklists:
Studies demonstrating the effectiveness of video modelling as a teaching strategy;
Scheflen, S., Freeman, S., & Paparella, T. (2012). Using video modeling to teach young children with autism developmentally appropriate play and connected speech. Education and Training in Autism and Developmental Disabilities, 47(3), 302–318
Colour coded approaches to teaching sentences structures
Bryan, A. (1997) Colourful Semantics: thematic role therapy. In Chiat, S., Law, J. and Marshall, J. (Eds) Language Disorders in Children and Adults: Psycholinguistic approaches to therapy. London: Whurr.
Bolderson et al in (2011) Colourful Semantics: A clinical investigation. Child Language Teaching and Therapy October 2011 vol. 27 no. 3 344-353.
Ebbels, S. (2007) Teaching grammar to school-aged children with specific language impairment using Shape Coding. Child Language Teaching and Therapy 2007 vol. 23, no. 1 67-93
OLSEL Project Colourful Semantics Strategy Supporting Classroom Practice