CK-12 Foundation
Change of Base: River Logs
Using the answers to the challenge questions, class members work through simplifying a complex logarithmic expression that requires changing bases. Pupils drag values to fill in the steps to arrive at a numerical equivalent expression.
Royal Society of Chemistry
Units of Volume
Did you know in the UK a quart is smaller than in America? This explains why a standard unit of measure is necessary for volume. Young scientists learn the similarities and differences between five different units used to measure volume....
Council for Economic Education
What's the Big Deal about Spices?
Today's gourmands don't consider spices to be the equivalent of silver and gold. During the middle ages, however, these commodities were precious. People back then used spices in religious ceremonies, to cure rotten food, and as a show...
Illustrative Mathematics
Making 22 Seventeenths in Different Ways
There is more than one way to determine a sum. Scholars demonstrate their understanding of the decomposition of fractions similar to the decomposition of whole numbers. The short task requires pupils to determine which sums of fractions...
Math Antics
Fractions Are Parts
Cut it up into parts and make fractions. The short video provides a definition of fractions as being a representation of parts of a whole. Using drawings, the presentation shows how to determine the bottom and top numbers for a fraction...
Corbett Maths
Mixed Numbers to Improper Fractions
Mix things up a little to be improper. The presenter shows three example of changing a mixed number to an equivalent improper fraction. Scholars work several practice problems and application questions to refine the process.
EngageNY
Transforming Rational Functions
Move all rational functions—well, maybe. Learners investigate the graphs of the reciprocals of power functions to determine a pattern between the graph and the power. Pupils graph rational functions where transformations are clearly...
EngageNY
Rational Functions
Make a connection between rational expressions and rational functions. Pupils review simplifying and performing operations on rational expressions and recall what it means for two rational expressions to be equivalent based on their...
Bonneville
Solar Tracker Challenge
Follow the light—not with one's eyes—but with a special solar tracker. Future engineers design and build a device that tracks light. They must build circuits in which solar cells rotate to receive equal amounts of light.
Health Smart Virginia
Inclusion
Inclusion is the focus of a lesson that looks closely at how to make equal groups in cooperative settings. Using physical education activities, scholars are challenged to create groups quickly and inclusively. After several activities,...
Curated OER
Interactive Fractions
Middle schoolers determine the common denominator of two unlike fractions. They practice adding fractions and finding equivalent fractions of numbers. They compare and contrast different types of equations involving fractions and...
Curated OER
Converting Fractions to Decimals
Seventh graders take a simple fraction and give it decimal form either by the use of equivalent fractions or division with a calculator.
Curated OER
Number Line Mathematics
Students translate problem situations into diagrams, models, and numerals using whole numbers, fractions, mixed numbers, decimals, and percents. They identify that numbers in different forms are equivalent or not equivalent using whole...
Illustrative Mathematics
Rectangle Perimeter 3
This activity looks at writing expressions to represent perimeter of a rectangle and then considers the concept of equivalent expressions and the distributive property in more detail.
Curated OER
Fraction and Decimal Ordering
Ordering numbers just got physical! Learners practice putting numbers in sequence, both in fraction and decimal form. To begin, they line up in birthday order and discuss the difference between ascending and descending. They are then...
Curated OER
One-digit Division
Young mathematicians read the book, The Doorbell Rang. They examine the necessity of division in everyday life, such as cooking and sharing. They use paper cookies to construct equivalent sets.
Curated OER
Adding Fractions with Unlike Denominators
Students explore why denominators need to match before adding (or subtracting) a fraction. They use unmarked fraction circles and marked fraction bars, to discover a method to add fractions with unlike denominators using equivalent...
University of Arkansas
Twizzling Fractions
Using food as a manipulative is one of the best ways to incorporate hands-on learning in the classroom. This hands-on approach allows young mathematicians to compare, order, and identify fractions with the use of Twizzlers® and fraction...
Curated OER
Money in Action
Students become familiar with the various coins in our money system as well as amount of each coin. They help develop their ability to count change and find different ways to show equal amounts.
Curated OER
Algebra 1: Simplifying Radicals
After discussing the difference between rational and irrational numbers, the class pratices simplifying, adding, and subtracting radical expressions. They play a game which involves passing around cards until they have matching hands of...
Curated OER
Rational Numbers as Exponents
In this algebra worksheet, students rewrite 3 radical expressions as exponential notation. They change 6 quantities with fraction exponents into equivalent radical expressions. Students write three exponential expressions, eliminating...
Curated OER
Using Technology to Represent Mathematical Identities
Students explore the concept of trig identities. In this trig identity lesson, students use Mathematica to graph trig identities. Students see the trig identities graphically and enforce the notion that two trig functions can be equivalent.
Curated OER
Rationalize Denominators
Solve 10 different problems that include various rational expressions. First, learners rationalize the denominator in each set. Then, they write the conjugate for each binomial and determine the reciprocal. They also write an expression...
Curated OER
Subtract Fractions with Unlike Denominators
In this subtracting fractions worksheet, youngters learn to find equivalent fractions using a common denominator. They solve 11 problems in which simple fractions with unlike denominators are subtracted.
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