Counting

This lesson is on Counting outcomes, the multiplication principle, and Morgan's Law with examples and a detailed explanation of the topic.

Determine the unknown whole number in a multiplication or division equation relating three whole numbers.

In this video lesson Mr. Donnelly will show how to fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

This lesson is on Counting with Permutations & Combinations with examples and a detailed explanation of the topic.

This video lesson shows an animation and exercises of how to from 11 to 20 in a fun and effective manner. This is geared towards elementary aged students.

In this short mini-lesson demonstrated will be how to find the total possible number of options for given situations. For example if you have 3 shirts, two pants and 4 hats, how many different outfits can you pick?

Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each.

This video lesson shows an animation and song of how to from 10 in a fun and effective manner. This is geared towards elementary aged students.

Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each.