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Illustrative Mathematics
Overlapping Squares
The objective of this activity is to find the percent of the area of a two squares overlapping. Mathematicians find the ratio of area for the part that overlaps to the rectangle formed. The final answer is a percent as a rate per 100....
Illustrative Mathematics
Shirt Sale
Everyone loves a good deal, and your mathematician's job is to calculate the original price when given the discount. A different type of problem than the traditional "find the percent change" has your learners working backwards to...
Illustrative Mathematics
Sharing Prize Money
When three classrooms are to split up prize money, your mathematicians must find the percentage that each class deserves and calculate the total amount. There is an option to use a calculator and practice rounding.
Illustrative Mathematics
Sale!
Everyone loves a sale, and this worksheet allows learners to calculate which sale is more rewarding. The activity can be adapted for different thinking contexts. The answer key describes different answer choices, some being higher...
Curated OER
M&M Science and Math
A series of math and science activities feature M&M's® as manipulatives to help kids work through equations. The resource includes exercises on finding averages, percent of compositions, moles in chemical reactions, genotypes and...
Curated OER
Summer Intern
Your young apprentices build a function describing the percent concentration of salt in a brine. The rational function is then related to the parent function, y= 1/x, and graphed. Finally, the apprentices predict the amount of fresh...
Curated OER
Latitude
Your young geologists generate a graph given a table of values from the context of latitude and percent of the earth's surface north of that latitude. The questions in the activity then focus the learners to a deeper understanding of the...
Illustrative Mathematics
Accuracy of Carbon 14 Dating I
Here is an activity that is intended to highlight a very important issue about precision in reporting and understanding statements in a realistic scientific context. Discuss different ways of reporting the half life of Carbon 14...
National Nanotechnology Infrastructure Network
Lab 1: Nanocatalysts Clean Your Car Emissions
What a big job for such a small particle. Young scientists learn about the role of nanoparticles in catalytic converters for cars. They conduct an experiment to create alginate-MnO2 catalytic spheres.
Pedago Net
Acing Math
Deal me in! Elementary and middle school classes will love this selection of math games, all involving a deck of cards. From fractions to exponents to rounding up and down, the games cover such a variety of skills that your classroom...
Illustrative Mathematics
Accuracy of Carbon 14 Dating II
The scientific issue of carbon-14 dating and exponential decay gets a statistics-based treatment in this problem. The class starts with a basic investigation of carbon content, but then branches out to questions of accuracy and...
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Percents 2
Twenty-eight problems present a variety of percent topics: percents as fractions, improper, and mixed numbers, percents as decimals, simple interest, and percent of increase/decrease. They are given with each step to the solution...
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Percents 1
Twenty-five problems present a variety of percent topics: percents as fractions, improper, and mixed numbers, percents as decimals, simple interest, and percent of increase/decrease. They are given with each step to the solution cleverly...
Purple Math
Purplemath: Converting Between Decimals, Fractions, and Percents
Scroll down to just below the middle of the lesson for an in-depth lesson on converting fractions to percents. Works through numerous examples step by step and shows what happens when the "decimal expansion" doesn't end when converting.
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Percent of a Number
This Math Page tutorial explains how to find the percent of a number and features a practice to check comprehension.
Math Is Fun
Math Is Fun: Convert Percent to Fraction
Learn how to convert percents to fractions by following simple steps and viewing several examples.
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.
The Math League
The Math League: Percent & Probability
This tutorial gives definitions and examples of percents and probability and covers percent as a fraction and percent as a decimal.
Texas Instruments
Texas Instruments: Percent Square
In this activity, students use the Rational Number Rampage application to play a game and explore fractions, decimals, and percents. They are shown a hundred square grid with different number of squares colored and are required to...
Math Medics
S.o.s. Math: Percent to Fraction
Explains step-by-step how to change a percent to a fraction. Gives examples and exercises to practice this skill.
University of Cambridge
University of Cambridge: Nrich: Put Out the Flags
Sharpen your logic and percent skills while working on this challenge. A strategy for solving the problem and the solution are available from links on the left.
The Math League
The Math League: Percent and Probability: What Is a Percent?
This site defines a percent, explains it as a fraction and decimal, and shows how to estimate a percentage.
Math Is Fun
Math Is Fun: Convert Fraction to Percent
The learning activity examines how to convert a fraction to a percent. The resource consists of calculator steps, explanations, and examples with solutions.
Texas Instruments
Texas Instruments: Quilt Block Areas
In this activity, students will draw and color scaled drawings of traditional quilt block designs. They then find the appropriate fraction, decimal, and percent of the overall design for each color.