Kristin Pierce received her bachelor’s degree in Communication Sciences and Disorders from Baylor University and her master’s degree in Speech-Language Pathology from the University of Texas at Dallas. She is licensed to practice in the state of Texas and holds her Certificate of Clinical Competence from the American Speech-Language-Hearing Association. She has over 7 years of experience practicing speech-language pathology.

Kristin has worked with both the Allen and Frisco Independent School Districts, seeing early childhood and elementary students with a wide variety of speech and language disorders. Kristin has also enjoyed working on the Autism evaluation team and with assistive technology in both districts. She particularly enjoys working with articulation disorders, as well as targeting language and literacy. 
Cris Adams received her Bachelor's degree in Communication Sciences and Disorders from The University of Texas at Austin and her Master's degree in Communication Disorders and Speech Science from the University of Colorado at Boulder. She is licensed to practice in the state of Texas and holds the Certificate of Clinical Competence from the American Speech-Language-Hearing Association. She has over 22 years of experience practicing speech-language pathology.


Cris began her career working in Colorado Springs School District 11 as an autism and assistive technology specialist for elementary through high school age students. While living in Germany as a military spouse, Cris worked for the Department of Defense Dependents Schools. After taking a few years to stay home with her young children, Cris began to work for Allen ISD in 2000. She has worked extensively with preschool, elementary and secondary level children. Her passions include working with children with high-functioning autism, pragmatic language disorders, and difficult-to-remediate /r/ errors.

Amanda Dueck received her bachelor’s degree in Communication Sciences and Disorders from Oklahoma State University and her master’s degree in Speech-Language Pathology from the University of Kansas. She is licensed to practice in the state of Texas and holds her Certificate of Clinical Competence from the American Speech-Language-Hearing Association. She has over 10 years of experience practicing speech-language pathology.


Amanda began her career in a Kansas school district before taking some time off to be a full-time mom to her three children. She has worked with the Allen Independent School District since 2009, seeing students with a wide variety of speech and language disorders. She even had the opportunity to treat the son of Cornerstone Speech Therapy’s owners, Jeff and Stacie. Her work was impressive and a large part of why she joined the Cornerstone team. Some of Amanda’s favorite aspects of speech therapy include challenging articulation disorders as well as vocabulary and grammar development.

Amanda Dueck, M.A., CCC-SLP



​Katherine Powell received her bachelor’s degree in Communication Disorders from the University of Houston and her master's degree from Texas Women's University. She is licensed to practice in the state of Texas and holds her Certificate of Clinical Competence through the American Speech-Language-Hearing Association. She has over 16 years of experience practicing speech-language pathology.

Before coming to Cornerstone Speech Therapy, Katherine provided speech language therapy in the public school system for students ranging from preschool through high school. She has experience with a wide variety of speech and language disorders. She was also part of an autism team in the schools and is experienced in the use of assistive technology communication devices.  
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Alyssa Butcher, M.S., CCC-SLP

Alyssa received her bachelor’s degree in Communication Sciences and Disorders from the University of Oklahoma and her master’s degree in Speech-Language Pathology from the University of Texas at Dallas. She is licensed to practice in the state of Texas and holds her Certificate of Clinical Competence from the American Speech-Language-Hearing Association. She has 10 years of experience practicing speech-language pathology.


Alyssa has worked in a variety of settings with children and adults including home health, inpatient and outpatient hospital services, and outpatient clinics. In pediatric care, she has experience with autism, hearing loss, a broad range of articulation disorders, as well as expressive & receptive language disorders. With adults, Alyssa has training and experience with accent modification, LSVT (LOUD) for Parkinson’s Disease, and a variety of language deficits caused by brain injuries/trauma.

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We are growing and will be adding more therapists soon.



Stacie Smith, M.S., CCC-SLP

Stacie Smith is the owner of Cornerstone Speech Therapy. She received her bachelor's degree with honors in Communication Sciences and Disorders from Oklahoma State University and her master's degree in Speech-Language Pathology from the University of Tulsa. She is licensed to practice in the State of Texas and holds her certificate of Clinical Competence (CCC) through the American Speech-Language-Hearing Association. She served as President for the Speech Pathologists' Association near Dallas from 2006-2008.


Stacie enjoys working with kids and adults in speech therapy with a wide variety of communication disorders. She is certified to perform the Lee Silverman Voice Treatment (LSVT LOUD®), a specialized treatment protocol for patients with neurlogical diagnoses like Parkinson disease, multiple sclerosis, cerebral palsy, and stroke. She is also trained in PROMPT (Prompts for Restructuring Oral Muscular Phonetic Targets).


Stacie has worked in the inpatient and outpatient medical settings. She has been in private practice since 2004. She feels the personal attention she can provide families in this setting makes such a difference.


Stacie is married and has two sons. Her oldest son is a survivor of cancer of the brain and spine. Being the parent of a child that has also needed extensive physical, occupational, and speech therapy helps Stacie better understand the needs of the families she serves.






About Cornerstone Speech Therapy

Kristin Pierce, M.S., CCC-SLP

Cris Adams, M.A., CCC-SLP

Katherine Powell, M.S., CCC-SLP

Click here for employment opportunities at Cornerstone Speech Therapy.