Videos

• 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.

  Uploaded Sep 19, 2016
• 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.

  Uploaded Oct 07, 2016
• 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.

  Uploaded Sep 15, 2016
• 3:13 Multiplication 9

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

  Uploaded Sep 19, 2016

See all