"The Numero Cube System aligns very well with state standards for grades K-4. In particular the cognitive demand in the activities that were demonstrated using the cubes is at a very high level for primary and intermediate elementary students. The Numero Cube System addresses not just procedural knowledge for the basic operations it teaches, but helps build understanding as they make connections from concrete models to the symbolic manipulation of math.

We offer a course to teachers in our district called "Computational Fluency". This course is based on research that describes how students develop automaticity with number facts. Huong's Numero Cube System would be an excellent compliment to this course, because it provides the concrete model young students need as they develop understanding of number and number relationships.

The beauty of the Numero Cube System is the connections it helps kids make as they progress to more sophisticated mathematics and using more complex numbers. Rules that students learn for addition, subtraction, multiplication and division of increasingly complex numbers don't always work in the same way when working with rational numbers and integers. Using the Numero Cubes however, gives students a visual representation of the concepts so that manipulation is matched with visual images which tends to solidify understanding.

I am impressed with Ms. Huong's tool—its sound mathematics, its design and her attention to so many details. It is truly an impressive tool that I believe will serve Seattle students and students all over the world very well."

**Rosalind R. Wise**

K-12 Mathematics Program Manager

Seattle Schools

"As a mathematics specialist for Seattle Public Schools, I have had an opportunity to examine the prototype of the Numero Cubes that Huong Nguyen is developing. I found the physical hands-on nature of this product ideal for our early learners for the following reasons:

- The size of the cubes is appropriate for the audience that Ms. Nguyen is targeting. It will allow the young learners to easily grasp the cubes and manipulate them.
- The Tens capper will encourage the development of place value and re-grouping as they add and subtract various 1- and 2- digit numbers. This is unique to this product. The students will need to add the cap on to the top of a completed set of 10 before they can move it as a new single unit to the ten's column. And as the students subtract larger unit numbers from smaller unit numbers, they have to physically re-group and unpack a set of 10's by removing the cap.
- The partitioning separators that Ms. Nguyen has added to her tool will assist in the conceptual development of the decomposition of numbers. The students will be able to insert and extract the separators between the cubes with little difficulty.
- In addition, it will allow the students to physically develop the conceptual idea of groups of numbers thus providing an introduction to both multiplication and division.

I am excited to see this manipulative in action with students. It has great potential."

**Arthur T. Mabbott**

K-12 Mathematics Specialist

Seattle Schools