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

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Updated 9/21/16

Download our 2016 Product Catalog for books, assessments, DVDs, CDs, 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:

LIMITED OFFER! Order this book Developmental Hand Dysfunction: Theory, Assessment, and Treatment @ $83 from PRO-ED Inc. or (800) 897-3202) before October 1, 2016, when ownership will transfer to Erhardt Developmental Products. Send us a receipt showing proof of purchase (before October 1st) and $6.45 shipping costs, and you will receive these 5 FREE correlated materials from Erhardt Developmental Products (a total value of $325):
1. The Erhardt Developmental Prehension Assessment. CD. $25 (unlimited copies can be printed for educational or clinical purposes)
2. Prehension Stickers and Booklet. $20
3. Normal Hand Development: Birth to 15 Months. DVD. $90
4. Administration of the Erhardt Developmental Prehension Assessment: The Child with Developmental Disabilities. DVD. $95
5. Administration of the Erhardt Developmental Prehension Assessment: The Adolescent with Developmental Disabilities. DVD. $95

* Erhardt, R. P. (2016). Revision of the Erhardt Learning-Teaching Style Assessment (ELSA): Results of a qualitative pilot study. International Journal of Applied Psychology (in press).
* Erhardt, R. P. & Schmidt, H. (2016). Pediatric OTs love Lycra: Here's why! ADVANCE for Occupational Therapy Practitioners (in press).


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 45 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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