Lesson Plan
Illustrative Mathematics

Overlapping Squares

For Teachers 5th - 7th Standards
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....
Lesson Plan
Illustrative Mathematics

Shirt Sale

For Teachers 6th - 7th Standards
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...
Lesson Plan
Illustrative Mathematics

Sharing Prize Money

For Teachers 6th - 8th Standards
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. 
Lesson Plan
Illustrative Mathematics

Sale!

For Teachers 6th - 7th Standards
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...
Activity
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Curated OER

M&M Science and Math

For Teachers 6th - 12th
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...
Lesson Plan
Curated OER

Summer Intern

For Teachers 9th - 12th Standards
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...
Lesson Plan
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Curated OER

Latitude

For Teachers 9th - 12th Standards
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...
Lesson Plan
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Illustrative Mathematics

Accuracy of Carbon 14 Dating I

For Teachers 9th - 12th Standards
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...
Lesson Plan
National Nanotechnology Infrastructure Network

Lab 1: Nanocatalysts Clean Your Car Emissions

For Teachers 9th - 12th
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. 
Activity
Pedago Net

Acing Math

For Teachers 2nd - 8th
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...
Lesson Plan
Illustrative Mathematics

Accuracy of Carbon 14 Dating II

For Teachers 9th - 12th Standards
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...
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Percents 2

For Students 9th - 10th Standards
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...
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Percents 1

For Students 9th - 10th Standards
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...
Activity
Purple Math

Purplemath: Converting Between Decimals, Fractions, and Percents

For Students 9th - 10th
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.
Activity
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: Percent of a Number

For Students 3rd - 8th
This Math Page tutorial explains how to find the percent of a number and features a practice to check comprehension.
Activity
Math Is Fun

Math Is Fun: Convert Percent to Fraction

For Students 3rd - 8th
Learn how to convert percents to fractions by following simple steps and viewing several examples.
Activity
Help Algebra

Help algebra.com: Percents

For Students 9th - 10th
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.
Activity
The Math League

The Math League: Percent & Probability

For Students 3rd - 8th
This tutorial gives definitions and examples of percents and probability and covers percent as a fraction and percent as a decimal.
Activity
Texas Instruments

Texas Instruments: Percent Square

For Teachers 6th - 8th
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...
Activity
Math Medics

S.o.s. Math: Percent to Fraction

For Students 9th - 10th
Explains step-by-step how to change a percent to a fraction. Gives examples and exercises to practice this skill.
Activity
University of Cambridge

University of Cambridge: Nrich: Put Out the Flags

For Students 5th - 8th Standards
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.
Activity
The Math League

The Math League: Percent and Probability: What Is a Percent?

For Students 4th - 8th Standards
This site defines a percent, explains it as a fraction and decimal, and shows how to estimate a percentage.
Activity
Math Is Fun

Math Is Fun: Convert Fraction to Percent

For Students 3rd - 8th Standards
The learning activity examines how to convert a fraction to a percent. The resource consists of calculator steps, explanations, and examples with solutions.
Activity
Texas Instruments

Texas Instruments: Quilt Block Areas

For Teachers 6th - 8th
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.

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