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About CAS

About Comprehensive Assessment Services

Led by Licensed Educational Psychologist Donald Ghrist, LEP, Comprehensive Assessment Services (CAS) provides Independent Educational Evaluations (IEEs) across California. With over 25 years of experience, CAS is trusted by parents and districts for clear, defensible, IEP-ready recommendations.

Comprehensive Assessment Services supporting children through independent educational evaluations

Meet the Founder

Donald Ghrist is a Licensed Educational Psychologist (LEP #2703) with more than 25 years of experience in education and special education. As a former Coordinator of Special Education and founder of a nonpublic school for students with autism, Don brings practical insight into every evaluation. CAS was created to serve families and districts with evaluations that are objective, thorough, and student-centered.

Credentials & Expertise

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Licensed Educational Psychologist (LEP #2703), State of California
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25+ years experience across public, private, and nonpublic schools
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Former Coordinator of Special Education
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Founder & director of a nonpublic school for students with autism
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Expertise in psychoeducational, OT, SLP, and adaptive PE/PT IEEs

About CAS

CAS was founded to bridge the gap between families and districts by providing Independent Educational Evaluations that are clear, compliant, and student-focused. Our evaluations go beyond testing—they help IEP teams make informed decisions about eligibility, services, and placement.

  • Objective, unbiased assessments
  • Statewide California service with virtual options
  • Typical 30-day turnaround
  • Collaboration with parents and LEAs
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FAQ

About CAS — Frequently Asked Questions

What services does CAS provide?
CAS provides Independent Educational Evaluations (IEEs) in the areas of psychoeducational, occupational therapy, speech & language, and adaptive PE/physical therapy.
Where does CAS provide evaluations?
We provide statewide coverage across California, with both in-person and virtual options. In select cases, CAS also serves clients nationwide through virtual evaluations.
How quickly are reports delivered?
Typical turnaround is about 30 days from intake. We coordinate with districts and parents to meet agreed timelines.
Does CAS work with both parents and school districts?
Yes. CAS works collaboratively with both families and LEAs to ensure evaluations are defensible, objective, and usable.
Who leads the evaluations at CAS?
All evaluations are overseen and conducted by Donald Ghrist, LEP, with his 25+ years of professional experience in education and special education.

Work with CAS

Get clear, unbiased Independent Educational Evaluations with practical, IEP-ready recommendations.