Help Algebra
Help algebra.com: Percents
Converting percents to and from decimals and fractions is demonstrated in detailed examples. Once the concept is understood, you can use it to solve equations that contain percents.
Shmoop University
Shmoop: Ratios & Percentages: Working With Percents
Students learn how to find a percent of a number. The mathematics resource consists of examples and practice problems with answers.
CK-12 Foundation
Ck 12: Percent Composition and Empirical & Molecular Formulas
[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will learn to calculate the percent composition of a compound either from mass data or from the chemical formula. They will use...
Other
Achieve: Miniature Golf Design Task [Pdf]
In this task students are asked to combine numerous skills to create a miniature golf hole. Students create a scale drawing of the hole, calculate the area of the hole and determine the percentage of total area used. In addition,...
Social Science Education Consortium
Ssec: Employment Unemployment: How Can Both Rates Rise at the Same Time? [Pdf]
In this investigation, students are asked to explain a Wall Street Journal (WSJ) announcement about unemployment, and look for a contradiction in the message. Then they are introduced to the definitions of employment, unemployment, and...
Smithsonian Institution
Smithsonian Education: Idea Labs: Prehistoric Climate Change
Sort fossil leaves from 55 million years ago into groups with smooth or 'toothed' edges. Then, use a formula to calculate the percentage of each type and, from there, look at how high the temperature might have risen when global warming...
TeachEngineering
Teach Engineering: Students as Scientists
This curricular unit contains two lessons that let students actually do the work of scientists as they design their own experiments to answer questions they generate. In the first lesson and its associated activity, students conduct a...
PBS
Pbs Learning Media: Living With Diabetes
A patient discusses diabetes and how he manages his carbohydrate intake in this video segment from TV 411.
Texas Instruments
Texas Instruments: Science Today Breast Cancer Risks
The USA TODAY Snapshot? "Breast cancer risks" shows the percentage of women in several age categories that, statistically, develop breast cancer. Students will notice that the percentages increase as women get older. In this activity,...
PBS
Pbs: The Lowdown: Percents Defined
Learn how to calculate percent as a rate per 100 in this video from KQED. In the accompanying classroom activity, students model percent with a 10 x 10 grid. After watching the video, they create a design or picture on a 10 x 10 grid,...
Texas Instruments
Texas Instruments: Science Today West Nile Killing More People
After studying the USA TODAY Snapshot? "West Nile killing more people,"students will compare the number of West Nile cases in the United States over the past three years. From the data, percent increases and decreases from year to year...
Climate Literacy
Clean: A Fossil Thermometer
For this activity, students calculate temperatures during a time in the geologic record when rapid warming occurred using a well known method called 'leaf-margin analysis.' Students determine the percentage of the species that have...
TeachEngineering
Teach Engineering: How Much Sugar Is in Bubble Gum?
Most of the flavoring in gum is due to the sugar or other sweetener it contains. As gum is chewed, the sugar dissolves and is swallowed. After a piece of gum loses its flavor, it can be left to dry at room temperature and then the...
Illustrative Mathematics
Illustrative Mathematics: A Ced, a Rei Basketball
In this task, two brothers track how many games they have each won. Students are asked to make calculations based on the percentage of games won. They set up a rational equation (and a rational inequality) in one variable, and then solve...
Texas Education Agency
Texas Gateway: Chapter 7: How the Unemployment Rate Is Defined and Computed
By the end of this section, you will be able to do the following: Calculate the labor force percentage and the unemployment rate, Explain hidden unemployment and what it means to be in or out of the labor force, and Evaluate the...
Houghton Mifflin Harcourt
Holt, Rinehart and Winston: Homework Help Independent Practice: Percent Change Increase and Decrease
Get independent practice working with finding percent increase and decrease. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.
Northern Illinois University
Faculty Development and Instructional Design Center: Punctuation Quiz
A ten question punctuation quiz utilizing comma, colon, semicolon, and a period. If answered incorrectly, students are able to select a different answer. The percentage of accuracy from their first answer is calculated at the top.