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The amount of effort saved when using machines is called mechanical advantage (MA). Simple machines use mechanical advantage as a key property to their functionality, helping humans perform tasks that would require more force than a person could produce. We will use the lever as an example of a simple machine to illustrate the concept of mechanical advantage.

An interactive lesson discussing congruent triangles.

Outcomes

In this course you will learn about:

1. Conditions for congruency.
2. Proving congruent triangles.

This online activity provides you with exercises on converting fractions to decimals.

In this lesson you will learn that:

• Circuit diagrams are used to show how electrical components are connected in a circuit.
• Individual circuit components are represented using circuit symbols.
• Current is the flow of electrons around a circuit.
• Ammeters are used to measure the current flowing through components. 
• Components in a circuit resist current flow.
• Voltmeters are used to measure the potential difference across components.

This course will explain what decimals are, how fractions can be expressed as decimals and how to convert fractions to decimals.

This YouTube video introduces you to the basics of decimals.

Video 1: Explores the conversion of fractions to decimals: tenths, hundredths and thousandths
Video 2: Two examples of converting fractions to decimals

This video explores how decimals are represented on the number line.

Outcomes

In this lesson you will learn about:

1. The decimal number system.
2. Converting fractions to decimals.
3. Calculations with decimals.
4. Percentages.