Create your own centimeter ruler. Then, estimate and measure with lengths with it. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Think through ...

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Designers, engineers, builders and students looking for a versatile ruler which offers both millimeters and inches together with a unique aluminum design may be interested in the Re-ruler created by ...

Yuan Design Studio has created a very unique multifunctional hexagonal ruler to help redefine the traditional sketching tools. The metallic ruler is now available to back via Kickstarter with pledges ...