Discovery Learning International (DLI) is now part of Multi-Health Systems Inc. (MHS). All DLI products and services are being integrated into MHS Systems.
Learn more by clicking here.


Contact MHS today

Phone & Fax

United States and outside of North America
Tel: 1-800-456-3003
Fax: 1-888-540-4484
Tel: 1-800-268-6011
Fax: 1-888-540-4484
United Kingdom
Tel: (0) 845-601-7603
Fax: (0) 845-601-7604
For MHS Software Support
Tel: 1-800-496-8324
Fax: 1-888-540-4484



Customer Service
For general inquiries about products, services, status of orders, or accounts, contact

International Orders
For quotes on shipping and handling charges for international orders, contact

Software Support
For questions or assistance with online or software products, complete the Support Request Form or contact us at



United States and outside of North America
MHS Inc.
P.O. Box 950
North Tonawanda, New York, United States
MHS Inc.
3770 Victoria Park Ave.
Toronto, Ontario, Canada
M2H 3M6
United Kingdom
83 Baker Street
London, England


Returns Policy

Products purchased through Discovery Learning International may be returned for a partial refund. In order to be considered for a refund, returned items must be received in pristine condition, accompanied by a letter explaining the reason for the return.

  • Customers returning products within 30 days of purchase will receive a 90% refund of the purchase price*.
  • Customers returning products after 30 days of, but within 90 days of purchase will receive a 50% refund of purchase price.
  • No refunds will be made after 90 days of purchase.
  • Equals invoice price minus shipping and handling.