00:55 Little Einsteins

Music Class

00:23 28 + ? = 100 or 100 - 28 = ?

Students use a centimeter tape strip for a number line and standard size centimeter counting blocks to understand the difference between 2 numbers.

2:04 Multiplying 6

This video shows how multiply by six with understanding.

2:36 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.

3:13 Multiplication 9

This video shows how students can learn their 9 multiplication "groups" with understanding and depth.

1:43 Subtraction Strategies

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.

1:55 Subtraction Strategy

This is another example how students can approach subtraction with reason and simply add up the difference between the two numbers.