Erhardt Developmental Products
DVDs, Books, and other Materials about Child Development and Children with Disabilities



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Updated 11/12/2015

Download our Product Catalog for DVDs, books, assessments, posters, and charts that will help you assess and manage hand, visual, and feeding problems in children with developmental and learning disabilities. Or to have our catalog mailed to you, send your request in an email message, including your name and address. Or request the email version of the catalog as a PDF attachment for you to view and print in free Acrobat Reader. Please contact us by telephone: (651) 730-9004 or email:

NEW! Download the Handout for the Poster Presentation "Development of a Learning-Teaching Style Assessment: A Checklist for Documenting Observations and Teaching Strategies" at the Minnesota Occupational Therapy Association Conference November 7, 2015, Bloomington, Minnesota. An Interview with the author of the new assessment is also available for download.

FEATURED! All available on CDs: @ $25 each, for you to print unlimited copies for educational or clinical purposes.
* C14cd or C14em: The Erhardt Developmental Prehension Assessment (EDPA)
* C13cd or C13em: The Erhardt Developmental Vision Assessment (EDVA)
* HP!cd or HP12 em: The Erhardt Hand Preference Assessment (EHPA)

CLEARANCE! We have now discontinued the print formats of all our assessments (EDPA, EDVA, and EHPA). A limited inventory of each is on sale for 50%. Call or email us if you are interested.


We produce and distribute a variety of materials for professionals working with children who have developmental and multiple disabilities. The company was founded in 1989 by Rhoda P. Erhardt, MS, OTR/L, FAOTA, an occupational therapist specializing in pediatrics for more than 40 years. Mrs. Erhardt received her B.S. in occupational therapy from the University of Illinois, M.S. in child development from North Dakota State University, and pediatric NeuroDevelopmental Treatment (NDT) training in London, England. Her curriculum vitae includes education, work experience, honors, professional affiliations, consultation contracts, and publications

Currently in private practice in the Minneapolis/St.Paul area, she has provided evaluation and consultation services to families, health agencies, educational systems, and national corporations, and published and lectured extensively throughout the United States and overseas on topics such as prehension (hand skills), vision, eye-hand coordination, and feeding problems in children with cerebral palsy, as well as handwriting and perceptual problems in children with learning disabilities.

The 21 video programs in DVD format describe normal and atypical development, assessment procedures, and intervention programs. All DVDs are shipped with a CD containing enclosures:
* suggestions for inservice procedures
* viewing and discussion guides
* reports or scored test booklets (if applicable)
* scripts for translation into other languages or for hearing-impaired viewers.
Other products (books, assessments, posters, activity charts, etc.) are correlated with many of the video programs.

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Products designed Especially for Parents.

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