Exact prices change frequently, which is why only approximate ranges are listed.
$ - Under $5
$$ - Between $6 and $50
$$$ - Between $51 and $250
$$$$ - Over $250
Jones, F. W., Long, K., & Finlay, W. M. L. (2007). Symbols can improve the reading comprehension of adults with learning disabilities. Journal of Intellectual Disability Research, 51, 545–550.
Pampoulou, E., & Detheridge, C. (2007). The role of symbols in the mainstream to access literacy. Journal of Assistive Technologies, 1, 15-21.
Prest, J. M., Mirenda, P., & Mercier, D. (2010). Using Symbol-Supported Writing Software with Students with Down Syndrome: An Exploratory Study. Journal of Special Education Technology, 25, 1-12.
Sheehy, K., & Howe, M. J. A. (2001). Teaching non-readers with severe learning difficulties to recognise words: The effective use of symbols in a new technique. Westminster Studies in Education, 24, 61–71.
Written by Bronwyn Lamond, Last Revision May 2018