Intro:

Probability is the study of random events. The theory of probability is an important branch of mathematics with many practical applications in the physical, medical, biological and social sciences. An understanding of this theory is essential to appreciating weather reports, medical findings, political doings and the state lotteries. 

Probability: the chance or possibility that something will happen or the measure of likeliness that something will occur. 

Probability is usually expressed as a ratio of the number of likely outcomes compared with the total number of outcomes possible. Ask students if they can give an example of probability.

Lesson:

Probability Scale: You can use a probability scale to show the outcome of an event in words or values between 0 and 1. 

A value of 0 means the event is impossible. 

A value of 1 means the event is certain. 

A value of ½ means the event has an even chance of occurring.

A value between 0 and ½ is considered unlikely.

A value between ½ and 1 is considered likely.

This website gives a great example and an interactive part: http://www.bbc.co.uk/bitesize/ks3/maths/handling_data/probability/revision/2/

Go over a few more examples with your students until they understand the concept of the probability scale. 

Begin to explain how to find probability of a die as an example.

Once the students understand the concept of the die, have them go over this worksheet: 

Probability with numbers: http://www.math-aids.com/cgi/pdf_viewer_8.cgi?script_name=probability_numbers.pl&prob1=1&prob2=2&prob3=3&language=0&memo=&answer=1&x=144&y=17

Intro:

Probability is the study of random events. The theory of probability is an important branch of mathematics with many practical applications in the physical, medical, biological and social sciences. An understanding of this theory is essential to appreciating weather reports, medical findings, political doings and the state lotteries. 

Probability: the chance or possibility that something will happen or the measure of likeliness that something will occur. 

Probability is usually expressed as a ratio of the number of likely outcomes compared with the total number of outcomes possible. Ask students if they can give an example of probability.

Lesson:

Probability Scale: You can use a probability scale to show the outcome of an event in words or values between 0 and 1. 

A value of 0 means the event is impossible. 

A value of 1 means the event is certain. 

A value of ½ means the event has an even chance of occurring.

A value between 0 and ½ is considered unlikely.

A value between ½ and 1 is considered likely.

This website gives a great example and an interactive part: http://www.bbc.co.uk/bitesize/ks3/maths/handling_data/probability/revision/2/

Go over a few more examples with your students until they understand the concept of the probability scale. 

Begin to explain how to find probability of a die as an example.

Once the students understand the concept of the die, have them go over this worksheet: 

Probability with numbers: http://www.math-aids.com/cgi/pdf_viewer_8.cgi?script_name=probability_numbers.pl&prob1=1&prob2=2&prob3=3&language=0&memo=&answer=1&x=144&y=17

Intro:

Probability is the study of random events. The theory of probability is an important branch of mathematics with many practical applications in the physical, medical, biological and social sciences. An understanding of this theory is essential to appreciating weather reports, medical findings, political doings and the state lotteries. 

Probability: the chance or possibility that something will happen or the measure of likeliness that something will occur. 

Probability is usually expressed as a ratio of the number of likely outcomes compared with the total number of outcomes possible. Ask students if they can give an example of probability.

Lesson:

Probability Scale: You can use a probability scale to show the outcome of an event in words or values between 0 and 1. 

A value of 0 means the event is impossible. 

A value of 1 means the event is certain. 

A value of ½ means the event has an even chance of occurring.

A value between 0 and ½ is considered unlikely.

A value between ½ and 1 is considered likely.

This website gives a great example and an interactive part: http://www.bbc.co.uk/bitesize/ks3/maths/handling_data/probability/revision/2/

Go over a few more examples with your students until they understand the concept of the probability scale. 

Begin to explain how to find probability of a die as an example.

Once the students understand the concept of the die, have them go over this worksheet: 

Probability with numbers: http://www.math-aids.com/cgi/pdf_viewer_8.cgi?script_name=probability_numbers.pl&prob1=1&prob2=2&prob3=3&language=0&memo=&answer=1&x=144&y=17