Jackson Ryan was CNET's science editor, and a multiple award-winning one at that. Earlier, he'd been a scientist, but he realized he wasn't very happy sitting at a lab bench all day. Science writing, ...

Decompose numbers to subtract. Engage in a Number Talk focused on subtraction strategies. Decompose numbers to subtract. Engage in a Number Talk focused on subtraction strategies. Can you solve the ...

Use visual fraction models to add and subtract fractions with the same denominators. Use visual fraction models to add and subtract fractions with the same denominators. Notice patterns in the ...

Rita Bennett understands that teaching math to her second graders these days adds up to a whole lot more than 2 + 2 = 4. On one recent morning she presented the following problem to her Simi Valley, ...

A set of guidelines adopted by 45 states this year may turn children into "little mathematicians" who don't know how to do actual math. A few weeks ago, I wrote an article for TheAtlantic.com ...

Decimal values are parts of whole numbers, including tenths, hundredths and thousandths. You can add and subtract decimal numbers in the same way as whole numbers using place value charts. You can put ...