CK-12 Foundation
Ck 12: Algebra: Linear Equations Study Guide
This comprehensive study guide highlights the main terms and formulas needed to understand linear equations. Examples are included.
PBS
Pbs: Scale City: Scale Models in the Real World
This video explores scale models, including 1:12 dollhouse models, 1:24 railroad models, and 1:192 architectural models. It explains what the different ratios represent and asks students to consider how they can use measurement and...
CK-12 Foundation
Ck 12: Measurement: Scale Distances or Dimensions
[Free Registration/Login may be required to access all resource tools.] Recognize unit scale as a ratio between units of measure of scale dimension to actual dimension.
CK-12 Foundation
Ck 12: Arithmetic: Equivalent Fractions
[Free Registration/Login may be required to access all resource tools.] Understand and write equivalent fractions.
Other
Nm Learning Games Lab: Math Snacks
Games and videos, each accompanied by guidelines for teachers and students, cover math topics such as proportion, ratio, number line, scale, and measurement. Downloads are available for iPad, iPhone, and iPod Touch.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Similarity
This site contains a lesson plan for high school age learners. The objective is to discover the factor of proportionality in similar polygons and to relate this factor to the perimeters and areas of similar polygons.
CK-12 Foundation
Ck 12: Measurement: Unit Scale to Find Actual Dimensions
[Free Registration/Login may be required to access all resource tools.] Identify unit scale and use unit scale when problem solving.
CK-12 Foundation
Ck 12: Arithmetic: Decimals as Percents
[Free Registration/Login may be required to access all resource tools.] Write percents as decimals and decimals as percents
Math Playground
Math Playground: Problem Solving Videos
"Rated 'M' for middle school," Math TV invites you to tune in each week for videos of word problems being solved. Back episodes are available in subjects such as percentages, number sense, and fractions. Watch a problem worked out, then...
Annenberg Foundation
Annenberg Learner: Part C: Fibonacci Numbers
Look at an interesting application of ratios that demonstrates the amazing patterns that emerge when we examine mathematics. The Fibonacci numbers are found in art, music, and nature.
Illustrative Mathematics
Illustrative Mathematics: 7.rp Walk a Thon 2
The purpose of this task is for students to translate information about a context involving constant speed into information presented in a table and to find the time it takes to travel a unit distance as well as the distance traveled per...
National Council of Teachers of Mathematics
Nctm: Figure This: Vcr
This resource presents an interesting challenge for the serious mathematician with strong reasoning skills. Explore proportional reasoning, probabilities, fractions, and ratios in this challenge to figure out if you always get six hours...
PBS
Pbs: Scale City: Similar Figures in the Real World
This video features the Louisville Slugger Museum and Factory, home to the world's largest bat. Students see the role that measurement and engineering play in making bats to professional players' specifications and are asked to consider...
PBS
Pbs Learning Media: Cyberchase: Catching the Kidnapper
In this video segment from Cyberchase, the CyberSquad and Digit construct a physical profile of the person who kidnapped Choocroca, a giant cybercrocodile. [2:49]
Saddleback College
Algebra2 Go: Prealgebra
The resource consists of comprehensive learning tools such as class notes, video lectures, and templates through which students can review prealgebra topics.
Math Planet
Math Planet: Algebra 1: Calculating With Percents
Provides examples and a video lesson that illustrates how to solve percent problems.
ClassFlow
Class Flow: Sales Tax
[Free Registration/Login Required] In this flipchart, students apply ratio, percent, and direct proportion in situations. Students solve problems involving percentages such as percent increase/decrease, tax, commission, and discount.
ClassFlow
Class Flow: Balancing Chemical Equations
[Free Registration/Login Required] Students learn how to balance and interpret chemical equations and cover the law of definite proportions and mole ratios. Done in an engaging fashion. Assessment is paper written.
TED Talks
Ted: Ted Ed: Why Are Some People Left Handed?
Today, about one-tenth of the world's population are southpaws. Why are such a small proportion of people left-handed -- and why does the trait exist in the first place? The following video investigates how the uneven ratio of lefties...
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Deep Sea Drilling
In this activity, students learn about the JOIDES Resolution, an ocean-drilling vessel. They then use string to estimate the length of the ship and compare their estimates to the real length. They look at how deep the ocean water under...
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