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244 resources with the keyterm proportion

Lesson Planet

Sore Throats, Variation 1

For Teachers 6th - 8th Standards
Why does Nia's water taste saltier than Trey's if she put more into her cup than he did? Math masters set up proportions in order to compare the mixtures. This task effectively has learners apply the concepts of ratio and proportion to a...
Lesson Planet

How Fast is Usain Bolt?

For Teachers 6th - 8th Standards
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 2

For Teachers 6th - 8th Standards
Real-world multiple-step proportion problems are sometimes hard to find for your math class. Here is one designed specifically to meet that need. Learners use proportional relationships to determine price per share in the acquisition of...
Lesson Planet

7.RP Music Companies, Variation 1

For Teachers 6th - 8th Standards
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

Glowing Rectangles?

For Students 6th - 8th Standards
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?

For Teachers 6th - 8th Standards
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

For Teachers 6th - 8th Standards
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

For Teachers 6th - 8th Standards
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...
1 In 1 Collection
Lesson Planet

Candy Colors

For Teachers 6th - 8th Standards
Prepare bags of colored candies according to the manufacturers' claimed proportions. Let your statisticians take samples and combine results and compare them to the theoretical probabilities for choosing each color. Data tables,...
Lesson Planet

How Big Is That Star?

For Teachers 6th - 9th
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

Find a Number When a Percent is Known - Reteach 18.3

For Students 5th - 7th Standards
Two different ways to find a number when the percent is given are described on the top half of this handout. Eight practice problems follow. Concise, yet complete, this would make an appropriate addition to your choices of homework...
Lesson Planet

Ratio and Proportion

For Teachers 5th - 7th Standards
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

The Smart Son

For Teachers 6th - 9th Standards
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....
Lesson Planet

Understanding Proportions and Scale Drawings

For Teachers 7th - 8th
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...
Lesson Planet

The Fruits of Fairness

For Teachers 4th - 9th Standards
Unfortunately the world isn't fair, but exactly how unfair is it? In this cross-curricular lesson plan, young mathematicians explore the uneven distribution of wealth in the United States, using their knowledge of percents and...
Lesson Planet

Short Quiz 6.RP.1

For Students 5th - 7th Standards
Conclude an introductory lesson on ratios with a short four-question quiz. Starting with two word problems asking young mathematicians to determine the ratios described in real-world contexts, learners must then fill in the missing...
1 In 1 Collection
Lesson Planet

Adopt a Schoolyard Tree

For Teachers 2nd - 5th Standards
Help young scientists connect with nature and learn about trees with a fun life science activity. Heading out into the school yard, children choose a tree to adopt, taking measurements, writing descriptions, and drawing sketches of it in...
Lesson Planet

Stock Swaps, Variation 3

For Teachers 6th - 8th Standards
More on the fictitious takeover of the Apple Corporation by Microsoft. In this scenario, Microsoft has $28.00 per share to spare, so how many do they need to offer to make an even trade? This is an engaging problem to solve when...
Lesson Planet

Art Class, Variation 1

For Teachers 6th - 8th Standards
Student statisticians calculate ratios to determine how many shades of green were mixed by Ms. Baca's art class. They graph the number of blue parts against the number of yellow parts for each combination and discover that some produce...
1 In 1 Collection
Lesson Planet

Study Jams! Proportions

For Students 4th - 7th Standards
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...
3:49
Lesson Planet

How Do You Solve a Proportion by Finding an Equivalent Ratio?

For Teachers 4th - 7th
Find the missing value in this proportional equation. Look at the relationship of the two numerators and the two denominators to solve this proportional ratio.
2:16
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How Do You Determine if Two Ratios are Proportional Using Cross Products?

For Teachers 6th - 9th
Are these two given ratios proportional? One quick and easy way to answer this question is to cross multiply the two values. If the products are equal then they are proportional ratios. If they are not equal then they are not...
3:54
Lesson Planet

What is a Scale Drawing?

For Teachers 6th - 9th
Scale drawings are an easy and plausible way to represent large things, such as roads and buildings, on paper. This tutorial explains what a scale drawing is and uses the example of a house to demonstrate how a scale drawing works. It...
1:10
Lesson Planet

How Do You Solve a Proportion Using Cross Products?

For Teachers 6th - 10th
Cross multiply and solve for the unknown variable in this proportion problem. Then use the division property of equality to isolate that variable and get your solution.