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Receive FREE SHIPPING on orders over $99 placed on the Didax website and shipped within the contiguous US. No promo code is required to receive this offer.
The order total for free shipping is calculated after any discounts are applied. Orders containing Eureka Math Kits DO NOT qualify for free shipping.
Free shipping valid ONLY on orders placed on the Didax website shipped within the contiguous US. Our regular shipping policies applies to other orders.
Kathy Richardson, one of the leading authorities on elementary math, has spent years educating children in the early grades. Her recent book, How Children Learn Number Concepts, is a wonderful introduction to the Critical Learning Phases that elementary children move through as they are developing a sense of number. This concise book is full of information to guide teachers of all levels as they help students through the phases.