Practice plugging in values to equations and checking to see if the equations hold true. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Created to teach students of the 21st century, SOPHIA is bringing the basic types of chemical reactions straight to your fingertips. Become the commander of your own learning experiences as you take part in this interactive lesson...

This Purplemath lesson includes many different number properties explained by using examples.

A detailed description of the different types of chemical reactions in organic and inorganic chemistry.

[Free Registration/Login may be required to access all resource tools.] Decide which method is the best one to use to solve a system of linear equations.

[Free Registration/Login may be required to access all resource tools.] This concept reviews properties of equality and congruence.

This video lesson reviews the properties of equality and demonstrates how to use them to solve equations. Students can check their understanding with an assessment.

Covers the basic definitions involved in systems of linear equations.

Practice evaluating expressions in two variables by plugging in values for the variables. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Brush up on your math skills relating to systems of equations then try some practice problems to test your understanding.

A comprehensive guide for learning all about linear equations in two variables with definitions, how to solve them, solved examples, and practice questions.

Students will play learning games that teach students how to graph patterns and tables.

Read a definition of what protectionism is, what some historical variants for protectionism have been, and examples of protectionism.

In this experiment, students generate hydrogen gas and examine its properties. Teacher's notes are included.

A good background on base pair mutations as a whole, with an example and explanation of what a silent mutation is.

Lists the determinants of demand for a product and service. The site is useful for students wishing to look further into the causes of demands. Graphs and summaries are included to aid research.

What is a chemical reaction? Learn about chemical equations, the four types of chemical reactions, and other fun facts.

An excellent, detailed tutorial explaining trigonometric substitution. Includes formulas, equations and examples.

To solve polynomials of higher degree, use synthetic division as demonstrated here. The Rational Zero Theorem, Upper and Lower Bound Theorem, and Descartes Rule of Signs are explained.

Brush up on your math skills relating to evaluating expressions then try some practice problems to test your understanding.

[Free Registration/Login may be required to access all resource tools.] Write and solve linear inequalities.

[Free Registration/Login may be required to access all resource tools.] Definition and examples of a replacement reaction.

[Free Registration/Login may be required to access all resource tools.] Use mental math to solve and check single-variable equations

Practice evaluating expressions in two variables by plugging in values for the variables. These problems include some fractions and decimals. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch...