Sheila
Moderator
This paper also discusses the need for early intervention and the problems with-"significant discrepancy."
https://web.archive.org/web/20070112140204/http://www.ppionline.org/documents/SpecialEd_ch12.pdf
https://web.archive.org/web/20070112140204/http://www.ppionline.org/documents/SpecialEd_ch12.pdf