Curated OER
Coral Reefs Endangered
Students identify different types of nutritional relationships in a coral reef system and trace the energy flow. In this marine biology lesson students create a simulation of acidification of the coral reef.
Curated OER
Fraction Review
In this fractions worksheet, learners put fractions into their simplest form, write as improper fractions, add and subtract, estimate amounts, and more. They complete 31 problems.
Curated OER
Deism: Paine and Jefferson Student Worksheet
In this Deism worksheet, students read an article about the opinions of Thomas Paine and Thomas Jefferson. Students then respond to 12 short answer questions.
Curated OER
L'Hopital's Rule
Students discover and perfect methods of calculation based on rewriting, simplifying, and logarithmic L'Hopital when the traditional applications fail to produce a result.
Curated OER
Million Dollar Gift
Third graders create a box big enough to hold a million dollars. This is a project fun to do near the winter holidays with inexpensive gifts included in the boxes. This hands-on lesson very effectively demonstrates the concept of volume.
Curated OER
Breaking News English: Zimbabwe to Get a New Currency
In this English worksheet, students read "Zimbabwe to Get a New Currency," and then respond to 47 fill in the blank, 7 short answer, 20 matching, and 8 true or false questions about the selection.
Sophia Learning
Sophia: Introduction to Conjugates That Rationalize Denominators
Explore conjugates and conjugate pairs in order to rationalize denominators. Assessment to follow tutorial.
Sophia Learning
Sophia: Using Conjugates to Rationalize Denominators: Lesson 2
This lesson provides practice examples that use conjugates to rationalize denominators. It is 2 of 6 in the series titled "Using Conjugates to Rationalize Denominators."
Sophia Learning
Sophia: Introduction to Conjugates That Rationalize Denominators
Explore conjugates and how they are used to rationalize denominators. Assess learning with a quiz.
Cool Math
Coolmath: Rationalizing Denominators
This prealgebra lesson explains how to rationalize the denominator.
Integrated Publishing
Integrated Publishing: Rationalizing Denominators
Site provides an example on rationalizing denominators plus some practice exercises.
Cuemath
Cuemath: Simplifying Rational Expressions
Learn more about rational expressions by understanding how to simplify rational expressions step-by-step along with some solved examples and a few interactive questions to test your understanding.
McGraw Hill
Glencoe: Self Check Quizzes 3 Add and Subtract Fractions With Unlike Denominator
Use Glencoe's Math Course 3 randomly generated self-checking quiz to test your knowledge of adding and subtracting fractions with unlike denominators. Each question has a "Hint" link to help. Choose the correct answer for each problem....
Wolfram Research
Wolfram Math World: Rational Number
This site gives an overview of rational numbers, gives interesting facts about the rational numbers including countability and probability of a rational numbers denominator being even. The site also contains related links.
McGraw Hill
Glencoe: Self Check Quizzes 3 Add and Subtract Fractions With Like Denominators
Use Glencoe's Math Course 3 randomly generated self-checking quiz to test your knowledge of adding and subtracting fractions with like denominators. Each question has a "Hint" link to help. Choose the correct answer for each problem. At...
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: Adding & Sub. Rational Expressions
Rational expressions have never been so easy! Use this site to learn how to add and subtract them with ease and confidence. And common denominators? No Problem! Great practice problems are included to see how much you've learned.
Sophia Learning
Sophia: Adding and Subtracting Rational Expressions
This learning tutorial investigates how to add and subtract rational expressions with like and unlike denominators. The lesson includes two videos that demonstrate the process of adding and subtracting rational expressions and four...
Khan Academy
Khan Academy: Add and Subtract Rational Expressions: Unlike Denominators
Add and subtract rational expressions with relatively prime denominators by manipulating them to have the same denominators. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or...
Khan Academy
Khan Academy: Add and Subtract Rational Expressions: Like Denominators
Check your understanding of how to add and subtract rational expressions that have like denominators with these problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive...
Khan Academy
Khan Academy: Add and Subtract Rational Expressions: Factored Denominators
Check your understanding of how to add and subtract rational expressions with these problems where the denominators have factors. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or...
CK-12 Foundation
Ck 12: Algebra: Adding and Subtracting Rational Expressions
[Free Registration/Login may be required to access all resource tools.] This lesson covers adding and subtracting rational expressions when one of the denominators is the LCD. Students can look at guided notes and attempt practice problems.
Math Planet
Math Planet: Simplify Rational Expression
An algebraic expression where both the numerator and the denominator are polynomials e.g.(x+3) / x is called a rational expression. Since the denominator can't be zero there are values of x which are excluded from the rational...
CK-12 Foundation
Ck 12: Algebra: Clearing Denominators in Rational Equations
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn how to solve rational equations by clearing denominators. Students examine guided notes, review guided practice, watch instructional...
CK-12 Foundation
Ck 12: 2.3 Adding and Subtracting Rational Expressions
This section explores the process for adding and subtracting rational expressions. It primarily focuses on how to identify and use the Least Common Denominator to combine fractions with rational expressions.