Common Core*

One hallmark of mathematical understanding is the ability to justify, in a way appropriate to the student's mathematical maturity, why a particular mathematical statement is true or where a mathematical rule comes from.

- Common Core State Standards for Mathematics, Introduction: Understanding Mathematics

The goal of the Common Core State Standards (CCSS) is to provide students with critical knowledge and skills for success in the 21st century. Gizmos help students of all ability levels to develop the deep knowledge that the Common Core's content standards demand, while enhancing their mathematical expertise, as outlined in the Standards for Mathematical Practice.

Gizmos allow students to go beyond memorizing facts, formulas and mnemonics, and instead enable students to develop a deep conceptual understanding of underlying principles.