Students use a centimeter tape strip for a number line and standard size centimeter counting blocks to understand the difference between 2 numbers.
This video shows how multiply by six with understanding.
Horizontal Subtraction Made Efficient and Understandable
In this example, the standard horizontal algorithm is turned into a number line giving students a method of solving subtraction without regrouping nonsense. Students focus on the difference between the two numbers and not isolating single digits with regrouping.
This video shows how students can learn their 9 multiplication "groups" with understanding and depth.
This video shows a major component of Common Core. Students need to make sense of what they're doing and avoid routine math steps that cause mathematical confusion.
This is another example how students can approach subtraction with reason and simply add up the difference between the two numbers.
Illustrates how subtraction can much more meaningful when using a Common Core approach.