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Instructional Video4:13
Curated Video

Proving Triangle Similarity Algebraically

K - 5th
In this video, the teacher explains how to prove the similarity of triangles algebraically using ratios of corresponding sides. The lesson begins by reviewing the concept of proportionality and then applies it to triangles. The teacher...
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Instructional Video3:47
Curated Video

Using Parentheses to Write and Read Algebraic Expressions

K - 5th
In this video, the teacher explains how parentheses are used to write algebraic expressions and ensure clarity in their meaning. The teacher demonstrates how to write the expression "three less than a number, times twenty" using...
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Instructional Video2:56
TED-Ed

TED-Ed: How taking a bath led to Archimedes' principle - Mark Salata

Pre-K - Higher Ed
Stories of discovery and invention often begin with a problem that needs solving. Summoned by the king to investigate a suspicious goldsmith, the early Greek mathematician Archimedes stumbles on the principle that would make him famous.
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Instructional Video4:50
Curated Video

Determining the Initial Value of a Linear Function

K - 5th
In this video, the teacher explains how to determine the initial value of a linear function by interpreting numeric, algebraic, and graphic representations. Using examples of an ice cream cup and a pool being emptied, the teacher...
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Instructional Video6:05
Curated Video

Factor Polynomials

3rd - Higher Ed
A video entitled “Factor Polynomials” which models how to factor quadratic equations.
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Instructional Video3:24
Curated Video

Associative Property of Multiplication

3rd - 5th
Apply the associative property of multiplication.
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Instructional Video3:43
Curated Video

Two-Step Equations

3rd - Higher Ed
Two-Step Equations shows how to write two-step single variable equations by using verbal models.
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Instructional Video12:16
Curated OER

Basic Math: Lesson 6 - #8 - Division of Fractions

5th - 7th
Dividing fractions! This clip begins with fraction circles described as parts of a whole, shows the actual fractions that represent the images, then defines what reciprocal means. Example problems employing the use of a reciprocal show...
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Instructional Video
Loyola University Chicago

Math Flix: Solving Wordsworth Puzzles

5th - 8th Standards
This QuickTime movie provides an opportunity to practice solving Wordsworth Puzzles using Algebra. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
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Instructional Video
Loyola University Chicago

Math Flix: Patterns the King's Chessboard 1

5th - 8th Standards
This part 1 of a QuickTime movie extends the concept of doubling based on the book "The King's Chessboard". The doubled numbers are also shown using exponents. The data is organized in a table. As you watch and listen to the teacher and...
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Instructional Video
Loyola University Chicago

Math Flix: Patterns the King's Chessboard 3 Activity

5th - 8th Standards
This QuickTime movie extends the concept of doubling based on the book "The King's Chessboard" using an activity sheet. Just click below the video on the hyperlink "The King's Chessboard. Some of the data is organize in a table. See if...
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Instructional Video
Loyola University Chicago

Math Flix: Patterns: Exponential Relationships 2

5th - 7th Standards
This part 2 of a QuickTime movie describes an exponential relationship in a real world setting and the stunning growth over time. The data is organized in a table. As you watch and listen to the teacher and students interact it helps...
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Instructional Video
Loyola University Chicago

Math Flix: Number Patterns 1

4th - 6th Standards
This QuickTime movie provides an opportunity to identify number patterns in a number sequence. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
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Instructional Video
Loyola University Chicago

Math Flix: Patterns: Exponential Relationships 1

5th - 8th Standards
This part 1 of a QuickTime movie compares both exponential and arithmetic relationships in a real world setting. The data for both is organize in a table. As you watch and listen to the teacher and students interact it helps clarify the...
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Instructional Video
Loyola University Chicago

Math Flix: Patterns the King's Chessboard 2

5th - 8th Standards
This part 2 of a QuickTime movie extends the concept of doubling based on the book "The King's Chessboard". The data is organize in a table that also shows the total each day from all the previous days. As you watch and listen to the...

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