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...

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

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...

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...

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...

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...

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...

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...

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,...

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...

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...

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...

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....

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...

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 worksheet.

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...

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...

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...

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...

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...

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...

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.

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...

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...