Curated OER
Singapore Math: Grade 3a, Unit 2 (Part 7)
If you need to extend your four-digit addition example problems, this video is perfect. Sal provides a variety of practice problems firmly based on the place value system. Each problem is wonderfully explained using multiple colors and a...
Khan Academy
The Distributive Law of Multiplication Over Subtraction, Pre-Algebra
This video is excellent preparation for order of operations and linear equations. There are two videos on the distributive property of multiplication. The first one showed why distribution works. This one shows the process clearly and...
Khan Academy
The Distributive Law of Multiplication Over Addition, Pre-Algebra
Elementary schoolers observe Sal evaluate the expression 4(8+3) and then use the distributive property to solve it. Using different colors to make the process transparent, Sal explains not only how to use the distributive property but,...
Khan Academy
Decimals and Fractions on a Number Line, Decimals, Pre-Algebra
Using a number line can provide students with a concrete representation of the value various numbers hold. Sal plots six different numbers on a number line. He includes whole, decimal, and negative numbers.
Curated OER
Salty & Pierre: Number 5
In this video, Salty and Pierre, French inspectors, search for the number five. They look in a doghouse and encounter the number and the dog. This film could be used to kick off a lesson on numbers from zero to five.
Khan Academy
Decimal Place Value, Decimals, Pre-Algebra
Having a good number sense is key to understanding place value. This video clearly explains the place values that comprise a decimal number. It is a very straightforward presentation and would be appropriate for grades three, four, or...
Khan Academy
Multiplying Fractions Word Problem: Banana Oat Muffin Recipe, Pre-Algebra
Word problems are a great way to help learners visualize and understand why fractions are so important. Sal determines what fraction of 3/4 cup of oats he will need if he is making 1/2 a recipe. He uses drawings to demonstrate why one...
Curated OER
Rocks #9
The number 9 is the star of this video. The number is shown using a pile of rocks. It's just a short video, but it could be used to introduce the number in preschool or kindergarten class.
Curated OER
Nasa Count Down
A real astronaut in a space ship counts down from 10. When he reaches 10, a rocket blasts off. This would be a wonderful way to practice counting down. It's motivating!
Curated OER
The Count Sings Of 8
Eight is great in this video. The Count sings a song about the number 8 and counts objects. He counts eight skates on a crate.
Curated OER
Ladybug Picnic #12
Using music and great visuals, this video would be an interesting and motivating way to review the number 12. It could be used in a pre-school or kindergarten classroom.
Curated OER
Street Steppin'
The number 8 is featured in this film with street dancers. Stepping and stomping, these dancers count from one to eight. You could have children clap and stomp while counting in the classroom to appeal to those who learn through movement.
Curated OER
Two-headed Monster Shows 14
A two-headed monster tries unsuccessfully to count to 14 using cows, chickens, and more. Eventually, the character adds all of the animals together to reach 14. This is a great way to introduce this number, and highlight addition skills.
Khan Academy
Singapore Math: Grade 3a, Unit 1 (Part 9)
Have your class work through exercises focused on number patterns with place value. Present each problem, allow your class to work through it, and then show them what Sal did to solve each problem. Every problem is completely explained...
Khan Academy
Writing a Number in Expanded Form, Arithmetic Properties, Pre-Algebra
Understanding place value is a basic mathematics skill. This Khan Academy video shows students how to write the number 14,897 in the expanded form. He explains that the 7 in the ones place is equivalent to 7x1, the 9 in the tens place is...
Khan Academy
Writing a Number in Standard Form, Arithmetic Properties, Pre-Algebra
Viewing this Khan Academy video helps with grasping the concept of place value. Learners write the word six hundred forty-five million, five hundred eight-four thousand, four hundred sixty-two in standard form, using multiplication as a...
Khan Academy
Recognizing Divisibility, Factors and Multiples, Pre-Algebra
The divisibility rules are invaluable tools to possess. Sal teaches students to recognize divisibility using the divisibility rules. He explains why 380 is divisible by some numbers and not by others. Tip: Create a handout on the...
Khan Academy
Number Sets, Fractions, Pre-Algebra
Knowing mathematic terminology is vital for building a functional academic vocabulary. In this video, Sal defines number sets and the terms natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers....
Khan Academy
Identity Property of 1, Arithmetic Properties, Pre-Algebra
Part of building solid number sense is understanding the laws and properties of multiplication and addition. Elementary school students can watch Sal multiply using the number one. He explains that multiplying any number by one equals...
Khan Academy
Rounding Whole Numbers 2, Arithmetic Properties, Pre-Algebra
This is the second in a series of three Khan Academy videos on rounding whole numbers. Students watch Sal Khan round the number 423,275 to the nearest thousand by looking at the number in the hundreds place. If it is five or higher, you...
Khan Academy
Finding a Number's Place Value, Arithmetic Properties, Pre-Algebra
Khan Academy helps learners grasp the concept of Place Value. Students will break down the number 4356 as four thousands plus three hundreds plus five tens plus six ones, and then label the number by place value. This video would be most...
Khan Academy
Mixed Numbers: Changing from an Improper Fraction, Fractions, Pre-Algebra
This video on changing improper fractions to mixed numbers would nicely complement the Khan Academy video on writing mixed numbers as improper fractions. Sal first shows students how to convert improper fractions. Then, he uses drawings...
Khan Academy
Understanding Square Roots, Pre-Algebra
What is the square root of 100? Sal explains what the square root of 100 is, but he needs a little help explaining why. Note: This concept can be challenging for some. If you are showing this video to your class, it does not stand alone....
Khan Academy
Rounding Whole Numbers Example 1, Arithmetic Properties, Pre-Algebra
Rounding is an essential skill that must be used throughout the study of mathematics. This Khan Academy video is the first in a series of three. It shows how to round the number 24,259 to the nearest hundred, using a number line.