Milestones and Normative Info
From ASHA:
This is a .pdf file you can download and/or
print out with developmental milestones for
ALL areas of communication, including
specific language skills.
Includes norms for adults and children
for various voice parameters: fundamental
frequency, amptlitude, s/z ratio,
phonatory duration
Discusses the rate and patterns of "normal
dysfluencies" in children as well as rate for
spontaneous remission, vs. symptoms
of true stuttering
Age norms for Mean Length of Utterance,
as well as development of various
morphological structures.
Foreign Languages
Normative info about MLU, morphology,
and verb tense acquisition in Spanish
Narrative Development
1. Hedberg and Westby (1993)
Narrative stages
2. Free download for
Test of Narrative
Retell has developmental data Pk-3rd gr
Chapman's developmental stages for
questioning skills
Compiles the norms from several
From Wiig & Semel, source unknown
From North Shore Pediatric Therapy.
No references given.
Ages at which 80-90 percent of typical
students have achieved particular
phonological skill

Moats, L, & Tolman, C (2009). Language
Essentials for Teachers of Reading and
Spelling (LETRS): The Speech Sounds of
English: Phonetics, Phonology, and
Phoneme Awareness (Module 2). Boston:
Sopris West.
The Standardized Visual
Communication and Sign Language
Checklist for Signing Children
from Project Muse, published by
Gallaudet Univ Pub.
Review in AJSLP by Sharynne McLeod
and Kathryn Crowe (2018)