### We found 419 resources with the keyterm ratio

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Population Genetics

Other Resource Types ( 419 )

Lesson Planet

#### Writing Task 6.RP.1

Sixth graders apply their knowledge of rates to solve a simple word problem on this short formative assessment. Using the weekly earnings of two babysitters who work for the same wage, learners are asked to determine the number of hours...

Lesson Planet

#### Writing Task 6.RP.2

Angela and Esteban are both fast, but who is faster? This exit card provides the time and distance ran by each child, and requires young mathematicians to use ratios to determine which of the two is the faster runner. A perfect resource...

Lesson Planet

#### Party Planning

Inspire mathematicians to see how ratio concepts can be used to plan a class bash! They determine which candy is the best deal. They alter a recipe to produce enough baked treats. They select the most cost-effective contents for a goodie...

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#### Comparison Shopping: Getting the Most for Your Money

Who isn't interested in shopping for food? Set up two markets in your math class: HalfFoods and DJ's, then send the kids off to compare prices. Occasionally throw a discount into the mix! Through this experience, seventh graders practice...

Lesson Planet

#### 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.

Lesson Planet

#### Designing a Kitchen Backsplash

Pupils protect a kitchen wall that stands behind the stove by designing a backsplash. Samuel's parents want a backsplash with specific color ratios for the tiny square tiles that will be included. Learners do the math and glue colored...

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#### Grocery Store Gas Points

Three different solutions are offered for this task. Math wizards work together to figure out how much money Monica must spend at the supermarket in order to earn enough gas rewards to fill up her tank for less than the $35.00 she has...

Lesson Planet

#### Neighborhood Snow Removal

Everyone loves a little competition, and in this scenario, two neighbors go neck-and-neck to see who shovels snow faster. Your sixth grade mathematicians can place their bets and then use ratio and rate reasoning to determine the winner!

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#### The Story of Pencils

Did you know that a standard pencil can produce a line that is 35 miles long? This and other pencil trivia make up the information that is used in solving proportion problems on this five-problem learning exercise.

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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.

Lesson Planet

#### 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...

Lesson Planet

#### 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

#### 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...

Lesson Planet

#### 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.

Lesson Planet

#### 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...

Lesson Planet

#### 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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#### Circles: Radius, Diameter and Circumference

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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...

Lesson Planet

#### 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

#### 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...

Lesson Planet

#### 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...

Lesson Planet

#### Hair & Nails: How Fast Do They Grow?

Find here a complete lesson dealing with the equations and graphs of proportional relationships, as well as what each individual point on such a graph represents. It may appeal to girls in particular, as the data details the growth rates...

Lesson Planet

#### Shrinky Dinks

Who doesn't love Shrinky Dinks projects? Use them in your math class to teach how to derive a constant of proportionality. Learners take measurements on pre-shrunk plastic forms, and after heating, measure again. They use before and...

Lesson Planet

#### Photo Sizes Task

Photograph prints are often ordered as 4" x 6", 5" x 7", or 8" x 10", but did you know that these sizes are not proportional? Math wizards compare the ratios using different methods, such as graphing, in order to discover this fact. A...