This video illustrates how manipulatives can be used to show the relation between strategies for subtraction and addition.
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These videos illustrate how parents and grandparents can implement the NCII reading and mathematics sample lessons to provide additional practice.
This video shows how manipulatives can be used to explain that multiplication represents groups of equal sets of numbers.
This video describes how to use the partial differences strategy to solve multi-digit subtraction.
This video shows how manipulatives can be used to explain subtraction using a part-part-whole structure.
This video shows how manipulatives can be used to explain addition using a part-part-whole structure.
This video illustrates the use of an efficient counting on strategy that students may practice to solve simple subtraction problems without the use of manipulatives.
This video demonstrates how to use the set model to add fractions with unlike denominators. Students need to have the prerequisite conceptual knowledge of finding like denominators before they can apply addition strategies to fractions with unlike denominators. The set model is beneficial for students who do not have automaticity with mentally determining multiples because they can count and move pieces to determine a like denominator.
This video demonstrates how to use fraction tiles to add fractions with unlike denominators. Teachers should model how to find like denominators to solve addition problems and students who struggle may benefit from using a multiples chart. Students should also have many opportunities adding fractions that have a sum equal to or greater than 1.
This video demonstrates how to use fraction tiles to add fractions with unlike denominators. Teachers should model how to find like denominators to solve addition problems and students who struggle may benefit from using a multiples chart.