This video illustrates how to use the traditional addition algorithm with regrouping.
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In this video, Dr. Rebecca Zumeta Edmonds, Co-Director of NCII discusses the differences between the terms “multi-tiered system of supports (MTSS)” and “Response to Intervention (RtI).”
This video illustrates how to use the traditional algorithm to solve subtraction with regrouping. The traditional algorithm focuses on digit placement and requires that students move right to left to correctly perform the operation. Before students are introduced to the standard addition algorithm, it is important that they have a conceptual understanding of regrouping. This will allow students to correctly use the algorithm when they exchange 10 ones in the ones place value column with 1 ten in the tens place value column. It is important for students to know and understand how to use the traditional algorithm because it is an efficient strategy to use if regrouping is required, when numbers have varying numbers of digits, and when the numbers included are too large to reasonably use other strategies (e.g., partial differences can become confusing for students who do not understand negative integers).
This video illustrates the use of manipulatives to help students integrate the concept of counting by ones with skill in grouping by tens.
This video demonstrates how to use base-10 blocks and a place value chart to help students subtract multi-digit numbers that require regrouping.
This video demonstrates how to use base-10 blocks to help students solve multiplication problems that cannot be solved with automatic retrieval.
This video describes how to use the partial differences strategy to solve multi-digit subtraction.
This video reviews to how use the traditional algorithm to solve multiplication with regrouping.
This video illustrates the use of finger counting to count by tens and ones.
This video illustrates the use of manipulatives to help students develop fluency in counting by tens and ones.