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### We found 298 resources with the keyterm ratio

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Volcano

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Ancient Egypt | What Everyday Life Was...

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Algebra 50 - Three Variable Systems in the...

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Lesson Planet: Curated OER

#### Study Jams! Ratio

What is the ratio of wins to total games for Mia's soccer team? RJ teaches viewers how to figure it out with a step-by-step procedure. He shows them three different ways to represent ratios: word form, ratio form, and fraction form.

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#### How Fast is Usain Bolt?

Revisit the 2012 Summer Olympics by having seventh graders calculate the unit rate sprinting speed of the 100-meter gold medal winner.

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#### 7.RP Music Companies, Variation 1

We've got the beat! And your musically-minded mathematicians will tap their toes as they determine which music company would be getting a better deal based on their offers to buy out TunesTown. The topic is extended in an additional task...

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#### The Physics of Human Sperm vs. the Physics of the Sperm Whale

Here is an unusual comparison: the swimming conditions of a sperm cell and a sperm whale. Introduce your physics class to the Reynolds number by sharing this video comparison during your fluid mechanics unit. Afterward, teach them to...

Lesson Planet: Curated OER

#### More Advanced Ratio Problem-- with Algebra (HD version)

This lesson is a bit more challenging, but Sal provides an excellent step-by-step explanation. He uses of different colors to help learners follow the process for solving this problem. As he solves one problem, he poses another and...

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#### Introduction to Ratios (new HD version)

Sal defines ratios. Then he shows how to write ratios three different ways. This concept is then demonstrated with four examples for finding quantities by using ratios.

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#### Circles: Radius, Diameter and Circumference

Fascinating discussion regarding the origin of Pi accompanies a detailed explanation of how to find the circumference of a circle. Since this is the first installment in a series on circles, the concept of circumference is separated into...

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#### Advanced Ratio Problems

The instructor continues to build ratio problem-solving skills, algebraically. The two examples are very involved, but are thoroughly explained with the use of algebraic steps.

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#### Price per Pound and Pounds per Dollar

Help learners understand the concept of unit rate as it is applied to buying beans at a grocery store. The objective is to determine the unit rate in two ways, and then apply each ratio to an additional problem. The attached commentary...

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#### TV 411 What's Cooking? Salt

Here is a recipe for a practical cross-curricular lesson! Cover unit conversions and ratios for math, the periodic table of elements for science, the difference between sodium and salt and its relation to high blood pressure for...

Lesson Planet: Curated OER

#### What's Cooking? Carbohydrates

Chef Jamika is at it again, highlighting math and science in her cooking demonstrations. In this episode, ratios and fractions are introduced within the main topic of carbohydrates and the direction for making succotash! The general...

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#### Glowing Rectangles?

Middle school math masters use ratios to determine the missing dimensions of various HD television screens. They also compare different dimensions of screens and determine whether or not they fit the same ratio. They perform similar...

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#### How Big Is That Star?

Aspiring astronomers study stars. They compare stars and explain the relationship between radius, mass, and diameter. By creating a star simulation, they discover how a binary star system's orbit can cause changes in the observed...

Lesson Planet: Curated OER

#### Ratio and Proportion

Here you will find an excellent presentation for introducing or reviewing ratio and proportion. Pupils are introduced to some terms associated with ratios and proportions. Next, they are given examples to work with in order to gain solid...

Lesson Planet: Curated OER

#### The Smart Son

Grab your youngsters' attention by reading the poem, "Smart" by Shel Silverstein. The son in the poem was not smart in how he handled his money. Mathematics whizzes help him out by using ratio problems to re-calculate his money exchange....

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#### Understanding Proportions and Scale Drawings

Proportions are ratios found using multiplication or division. Middle schoolers solve measurement problems, find a figure's missing dimension, and find the distance between two points. Resource features four lesson plans with detailed...

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#### Lunch Food? Mmmm! Mmmm! Good!

Examine how nutrition plays an important role in our lives by conducting online research and developing lunch menus that satisfy nutritional requirements set up by the United States Department of Agriculture. Students download recipes,...

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#### Adopt a Schoolyard Tree

Help young scientists connect with nature and learn about trees with a fun life science lesson. Heading out into the school yard, children choose a tree to adopt, taking measurements, writing descriptions, and drawing sketches of it in...

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#### Stock Swaps, Variation 2

If Microsoft wanted to take over Apple, how many shares would they need to break even? This is an ideal task for seventh graders who are studying proportional relationships and applying them to real-world scenarios. Use it as an...

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#### Study Jams! Proportions

Join Zoe and Sam as they use proportions to budget money for their Green Earth Club. Watch as they set up and solve a series of proportions using cross multiplication and division. A great resource that brings together prior knowledge of...

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#### Study Jams! Rate

Zoe is reading books over vacation and wants to know at her current rate, how many will she finish by the end. Building on prior knowledge of fractions and ratios, young mathematicians learn how equivalent rates are used to answer her...

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#### Convert Measurement Units Using Ratio Tables

Converting units are ratios in disguise and can be easy solve. Although this video is the last in a series about different methods to solve ratio problems, it does not have to be used in conjunction with this series. It introduces the...

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#### Solve Ratio Problems Using Double Number Lines

Organization is the best way to make sure that ratios are set up correctly to be proportional. This video reviews how to solve ratio problems with addition and multiplication, shown in more detail in the prior two videos of this series,...

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#### How Do You Find the Sine of an Angle in a Right Triangle?

A trigonometric ratio is a ratio between two sides of a right triangle. In this problem, find sin(A) in the given right triangle. Use the ratio of the opposite side over the hypotenuse.