Integral Solutions

There are two kinds of math: the hard kind and the easy kind. The easy kind, practiced by ants, shrimp, Welsh Corgis -- and us -- is innate. But what innate calculating skills do we humans have? Leaving aside built-in mathematics, such as the visual system, ordinary people do just fine when...   Read more...

From the Publisher: With tips that work for earlier versions, too Get a handle on the tool that does everything from basic math to probabilities! Count yourself fortunate to have found this book! It’ll help you squeeze all the value from this handy device that not only solves equations and...   Read more...

Flash Skills are a line of mini-workbooks designed to focus on specific skills. Each book uses a unique theme and adorable art to help young learners master math and reading ...   Read more...