Instructional Video4:41
Curated Video

Charity Jars (Part 1) (Use equivalent fractions to solve word problems involving addition of fractions with like and unlike denominators)

K - 12th
Alex owns a supermarket; she placed an empty charity jar of the same size on each of her two counters. Jar A is marked by the following scale of fractions, one thirds, two thirds, 1. And jar B is marked by the following scale, one fifth,...
Instructional Video4:39
Curated Video

Adding Decimals Using a (10x10) Grid

K - 12th
Add decimals to hundredths using a 10 × 10 grid.
Instructional Video3:09
Curated Video

Reading and Writing Whole Numbers in Expanded Form (Example)

K - 12th
Read and write multi-digit whole numbers in expanded form.
Instructional Video5:02
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Multiplying Whole Numbers by Fractions

3rd - 5th
Multiply a whole number (n) by a fraction of the form n×(a/b) and recognize the equivalence of n×(a/b) and (a×n)×(1/b).
Instructional Video3:54
Curated Video

A Painter's Canvas (Part 2) (Represent decimal numbers using area models and equivalent fractions)

K - 12th
A painter divided his canvas into ten equal parts, as shown. 3 parts are painted black, 5 are painted red, and 2 are painted green. What is the decimal number representing each colored area of the canvas?
Instructional Video2:50
Instructional Video4:19
Curated Video

Mental Math - Subtraction

K - 12th
Compute differences mentally using the subtraction rules.
Instructional Video3:22
Curated Video

Solving Addition Equations Involving Decimals

3rd - 5th
Solving one-step decimal equations: addition.
Instructional Video4:38
Curated Video

Long Division (Two-Digit Dividend)

3rd - 5th
Use the traditional algorithm to divide two-digit by two-digit.
Instructional Video3:17
Curated Video

Weight Measurements

3rd - 5th
Weight or mass measurements in the US customary system.
Instructional Video2:19
Curated Video

Measuring Mass in Kilograms

3rd - 5th
Measure mass using units of kilogram.
Instructional Video2:42
Curated Video

Subtraction Using Base-Ten Blocks with Regrouping

3rd - 5th
Subtraction using base-ten blocks with regrouping.
Instructional Video2:56
Curated Video

Subtracting Integers Using a Number Line

3rd - 5th
Represent the subtraction of integers on a number line.
Instructional Video4:35
Curated Video

Volume with Fractional Edge Lengths

3rd - 5th
Find the volume of a figure with fractional edge lengths by using unit cubes with the appropriate unit fraction edge lengths.
Instructional Video2:59
Curated Video

Solving Subtraction Equations Involving Decimals

3rd - 5th
Solving one-step decimal equations: subtraction.
Instructional Video2:17
Curated Video

Pool Perimeter (Part 1) (Find the perimeter of a figure given a set of ordered pairs by drawing it on the coordinate plane)

3rd - 5th
Sam used a coordinate plane to draw a diagram of his pool. Each unit on the coordinate plane is equal to 1 foot. Let’s plot the points on our coordinate plane to make Sam’s pool diagram.
Instructional Video4:45
Curated Video

Making Lemonade (Graph, create and complete a table of equivalent ratios)

3rd - 5th
Devon is making lemonade from a mix. For every 2 tablespoons of lemonade powder, he needs 3 cups of water. What is the ratio of lemonade powder to water?
Instructional Video2:02
Curated Video

Least Common Multiple

3rd - 5th
Find the least common multiple of two numbers.
Instructional Video2:43
Curated Video

Histograms

3rd - 5th
Create a histogram to display data.
Instructional Video4:15
Curated Video

Subtracting Decimals Using the Number Line

3rd - 5th
Subtract decimals to hundredths using the number line.
Instructional Video4:01
Curated Video

Multiplying Two Fractions Using Area Models

K - 12th
Multiply a fraction by a fraction using area models.
Instructional Video6:21
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Graphs for Patterns

3rd - 5th
Observe the relationship between two patterns and graph the ordered two-tuples on a coordinate plane.
Instructional Video4:56
Curated Video

Sketching Angles

3rd - 5th
Sketch an angle of a specified measure.
Instructional Video3:33
Curated Video

Playing in the Park (Solve word problems to find the area of a rectangular shape)

3rd - 5th
Adam and Jack are playing in a small rectangular park... the length of this park is 7 yards and the width is 4 yards. What is the area of the park?