Ellis showed a subtraction problem, performed both using the traditional regrouping, or borrow-and-carry, algorithm and using an example from the common core. Here’s a screenshot of the two methods.

The Common Core's approach to math has proved among the most contentious aspects of the controversial national teaching standards. In short, the new methods for addition and multiplication ...

Under Common Core, ... Under Common Core, teaching simple addition takes a full minute, Texas governor says ... (For example 149 plus 236 becomes 150 plus 235 to make 385.) ...

When Common Core problems go viral, ... (the supposedly laughable Common Core example). ... it’s actually referred to as the “standard algorithm” for addition and subtraction, ...

Some people began commenting that they found the estimation problem ridiculous and a prime example of why the Common Core is ... 21 over two math questions about repeated addition ...

Reading the common-core standards can be overwhelming, so keep it simple when sharing them with parents. I like to break them down into parent-friendly, non-eduspeak language.

iStockPhoto. New tests aligned to Common Core standards feature in-depth tasks that some say will make the new exams better than the multiple-choice-heavy exams of the past.