Unit Plan
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Curated OER

Build Your Dream Science Lab

For Teachers 6th - 8th Standards
Would your ideal science lab be filled with bubbling beakers and zapping Tesla coils? Or would it contain state-of-the-art computer technology and data analysis? Dream big with an innovative lesson that connects math and language...
Assessment
Mathematics Assessment Project

Statistics and Probability

For Students 7th - 8th Standards
Quickly assess basic understandings of statistics and probability. The resource contains five quick tasks from the probability and statistics domain. The questions range from finding simple conditional probabilities to measures of...
PPT
Curated OER

Agriculture: Economics and Policy

For Teachers 12th - Higher Ed
Support your next lesson on Agriculture, economics, and policy with this presentation. Intended for use with a McGraw-Hill/Irwin textbook on Economics, this presentation notes key points regarding farming and economics in America....
Lesson Plan
Curated OER

Finding the Area of an Equilateral Triangle

For Teachers 9th - 11th Standards
The problem seems simple: find the area of the equilateral triangle whose sides are each length 1. In fact, this same problem is solved in 8th grade, addressing a different Common Core standard, using the formula for area of a triangle...
Lesson Plan
Illustrative Mathematics

Voting for Two, Variation 1

For Teachers 5th - 7th Standards
The votes are in and your mathematicians are going to calculate how many votes each candidate received. Three different solution choices are given, depending on which method is taught. Have your learners set up a table, compute parts, or...
Lesson Plan
Illustrative Mathematics

Voting for Two, Variation 2

For Teachers 5th - 7th Standards
John won the election, but by how much more? Your learners will calculate how many votes each candidate received in order to determine the difference. Use with other lessons provided in the series to practice different variations of this...
Lesson Plan
Illustrative Mathematics

Voting for Two, Variation 3

For Teachers 5th - 7th Standards
After calculating election votes, your learners must determine how many votes the winner, John, got above 50%. This multi-step problem encourages them to think in a deeper way about what the question is asking them to find. Use with...
Lesson Plan
Curated OER

Exploring Biomes Lesson 3: Endangered Biomes

For Teachers 6th - 10th
Future environmental scientists compare data from two different conservation strategies. Alone this lesson is sufficient, but as part of the Exploring Biomes unit produced by the Arizona Fish and Game Department, it becomes top-notch. 
Interactive
CK-12 Foundation

Fundamental Trigonometric Identities: Tangent Identity

For Students 10th - 12th
An identity that thieves can't steal  the tangent identity. Scholars manipulate ratios to investigate the tangent ratio and connect it to the sine and cosine ratios. An interactive that uses color coding helps with this task.
Lesson Plan
Curated OER

Frame Yourself

For Teachers 5th - 6th
Young ratio masters calculate and cut a frame (out of poster board) to accurately create an even frame around a picture of themselves. The frame needs to be proportional to the picture with constraints determined by the instructor. 
Worksheet
Curated OER

Eraser Dog: Percents

For Students 5th - 6th
In this percents worksheet, students solve 30 different problems related to determining percents of numbers. First, they define a percent as a ratio whose second term is 100. 
Lesson Plan
Curated OER

Australian food

For Teachers 6th - 7th
Use ratio and proportions to adjust recipe size. Middle schoolers investigate Australian food and adjust the recipe size for said foods according to the given situation. They then prepare Australian foods.
Printables
Texas State Energy Conservation Office

Power Systems & Efficiency

For Teachers 6th - 9th Standards
Are you looking for a reading resource about the efficiency of power systems? Here is one that introduces the output/input ratio, measurement of energy by joules or calories, and efficiency ratings. For STEM classes that are learning...
Interactive
Curated OER

Proportional Parts

For Students 9th - 10th
In this geometry worksheet, learners identify what makes triangles similar and congruent. They use SSS,SAS and AA to identify the correct ratio of each triangle. There are 15 questions.
Lesson Plan
Curated OER

The Laws of Sines and Cosines Made Simple!

For Teachers 10th - 12th
Students study the law of sine and cosine. In this pre-calculus lesson, students create a triangle and identify the different ratios of a non-right triangle. They use the properties of sine and cosine to solve.
PPT
Curated OER

Technology, R&D, and Efficiency

For Teachers 12th - Higher Ed
For use in conjunction with the 2002 McGraw-Hill/Irwin US Economics text, this presentation highlights key points and important vocabulary. Specific economic concepts and theories, R & D expenditures, rate-of-return curve and...
Worksheet
Curated OER

Boorito!

For Students 4th - 8th Standards
Delicious Chipotle burritos are a big treat, especially when they are offered for only $2.00. This Halloween-themed learning experience isn't tricky, but learners will need to think critically about division with large numbers in order...
Lesson Plan
Education Outside

Our Water Planet

For Teachers 3rd - 6th Standards
Fresh water is a precious resource. Most kids don't realize how little of the water on Earth is actually drinkable. This lesson will help to illuminate them on this important topic. They discus the ratio of water to land, where most...
Lesson Plan
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1
Curated OER

Growing Minds: My Plate

For Teachers Pre-K - 2nd Standards
Examine food choices and the nutritional properties of food groups with this visually appealing whole-class lesson plan. This will take a bit of preparation, but once you do it, you can use the materials for years. Using a food groups...
Worksheet
Curated OER

Attributes of Shapes

For Students Pre-K - 1st
Not all circles look the same! Expose shapes with the same name but different attributes through a matching exercise. Learners examine five shapes, matching them with a second set. For each, there is a shape bearing the same name, yet...
Lesson Plan
Curated OER

Basketball

For Teachers 9th - 12th Standards
Tap into the competitive nature of teenagers as your class practices setting up and solving rational equations. This activity starts with a specific ratio of games won to games played, then asks how many more games must be played to...
Worksheet
Math Worksheets Land

Percent Error and Percent Increase - Independent Practice Worksheet

For Students 6th - 8th Standards
Give your learners a small taste of the business world by calculating percent error and percent increase. The resource provides several practice problems to give your mathematicians practice setting up the ratio to convert to percents....
Interactive
CK-12 Foundation

Tangent Graphs: Slope and Angle

For Students 10th - 12th Standards
Learning about tangents doesn't have to be a slippery slope. Pupils drag a point around a unit circle to see how angle affects the slope of a line. They individually answer a set of challenge questions to come to the conclusion that...
Lesson Plan
Mathematics Assessment Project

Identifying Similar Triangles

For Teachers 7th - 9th Standards
Math whizzes work with angle sums and exterior angles to figure out the measure of other angles. This particular publication provides comprehensive support in the form of an anticipatory activity, questions designed to prompt discussion,...

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