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New Dynamic Duo

KEEN 5X & Prelude are offered together through the aegis of a partnership between two social enterprises, the Keen Learning Group and Heliotrope. KEEN 5X was developed by Dr. Edmond J. Dixon. Prelude was developed by Dr. Howard B. Esbin.

For more information about Prelude, please visit or write to

Schedule your free Prelude Pilot through your KEEN 5X Representative or call 1 877-746-8963