Dive Summary:

• Common Core standards are rewriting the rules of what children should know when and putting off some math skills that were once taught early on.
• The old way of adding, say, 96+83 would be to stack the numbers, and this concept would likely be introduced in the second grade; now that idea might be put off until fourth grade, and the way to add those numbers would be to write them horizontally, break them down by place value and reassemble the sums of the tens and ones places.
• Backers say regrouping like that may take longer, but it gives children a better view of what's really behind the numbers. 

Dive Insight:

A recent survey showed that 37 out of 40 responding states are forging ahead with the Common Core standards this year. At least 30 states are already teaching some of the standards.