on web orders over $99 - click for details

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.


You have no items in your shopping cart.

Product was successfully added to your shopping cart.

Tenable Pyramid


  • Availability: In stock
  • Item #: 284040W
  • Grades: 1-5
Quantities of this item are limited. All sales final.
This fun game builds fluency by drilling addition and subtraction in intervals of 10. Players place their stones on top of or next to existing stones with a value of more or less than 10. Build strategy while developing math fluency!

Includes game board, 55 stones, and instructions. 1-4 players.

KEY CCSS: 1.NBT.2, 1.NBT.4-6