College professor Dan Bach offers a review of various basic topics in arithmetic, pre-algebra, and algebra. Order of operations, exponents, square roots, variables, and combining terms are just a few of the many topics covered.

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...

On this interactive site students learn to arrange numerous events from unlikely to very likely.

Find a quick, concise explanation of how to add and subtract fractions. Step by step examples are included to help you understand how to find the sum or difference for fractions with both like and unlike denominators.

At this site from WyzAnt, the properties of simplifying algebraic multiplication are demonstrated with several examples to help the students get a good idea of whats going on. Examples with like variables as well as several with unlike...

[Free Registration/Login may be required to access all resource tools.] Find the difference of fractions with like or common denominators.

Do you need practice learning and remembering algebra vocabulary terms? This concentration game is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are correct.

Do you need practice learning and remembering algebra vocabulary terms? This matching game is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are correct.

Do you need practice learning and remembering algebra vocabulary terms? This practice with flash cards is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are correct.

Like humans, plants can be negatively affected by overcrowding. Unlike humans, plants cannot get up and move to a new environment or explore how to utilize new resources. This experiment will explore the effects of crowding (population...

Gross. What is that in the toilet? But maybe it's not just gross. Did you know there are bacteria that digest organic waste and create electrons? What if there was a way to collect those electrons to power a circuit? In this science fair...

In this fun lab activity, students will learn about the attraction and repulsion of magnets. Students will discover that like poles repel while unlike poles attract.

Focus on the "language" of probability by listing events from your life that are certain, impossible, likely and unlikely to happen. Determine the likelihood of an event occurring using a probability scale, based on a data set, and by...

If you're looking for a short review of the basic skills needed for arithmetic, prealgebra, and beginning algebra, this could be the site for you. Dan Bach, who teaches mathematics at Diablo Valley College in California, provides brief...

Part (a) of this task asks learners to use two different denominators to subtract fractions. The purpose of this is to help students realize that any common denominator will work, not just the least common denominator. Part (b) does not...

Dive in amongst the pinnipeds - the seals, walrus and sea lions - for a taste of what life is like for fin-footed, semi-aquatic mammals. Flat flippers help give these typically rotund, barrel-shaped animals an unlikely grace and beauty...

[Free Registration/Login may be required to access all resource tools.] Add fractions and mixed numbers with like and unlike denominators

[Free Registration/Login may be required to access all resource tools.] Add and subtract fractions and mixed numbers with like and unlike denominators

[Free Registration/Login may be required to access all resource tools.] In this lesson students subtract fractions and mixed numbers with like and unlike denominators. Students examine guided notes, review guided practice, watch...

The rules for subtracting fractions with like or unlike denominators are clearly explained at this website. Even mixed number subtraction is tackled! This is an excellent place to get step by step explanations for working with fractions.

This statue depicts the bodhisattva Maitreya. Bodhisattvas are enlightened beings who postpone their own salvation in order to help all sentient beings. The bodhisattva is an ideal type, not a depiction of an historical person like the...

While tragic mass shootings like the ones in Las Vegas and Orlando shine a spotlight on our nation's lax gun laws, these horrific events make up a tiny percentage of U.S. gun deaths. Suicide, other types of homicide and accidents play a...

This site offers review of fifteen algebra vocabulary words. Four games are offered, including matching, flashcards, concentration, and word search.

An introductory lesson in probability for students in grades three to five. The concepts presented in this lesson are interwoven, over time, into a current unit of study. Kids examine closely the "language" of probability as used in...