In the first lesson students will identify the sample space, identify simple events, use the Fundamental Counting Principle to find the number of ways two or more events can occur, find the probability of a compliment of an event, and use a tree diagram to find probabilities. Vocabulary is also incorporated into this lesson. The second lesson students will find the probability of an event given that another event has already occurred (conditional probabilities). They will determine if events are independent or dependent. They will use the multiplication rule to calculate probabilities. Vocabulary is also incorporated into this lesson. In the third lesson students will find probability of one event or another occurring. They will know when to use the addition rule for mutually exclusive events and when to use the general addition rule. The lesson includes key vocabulary and example problems. In the fourth and last lesson students will find the number of ways a group of objects can be arranged, They will find the number of ways to choose several objects from a group when order matters (permutations) and when order does not matter (combinations). They use counting principles to find probabilities. These lessons are in the form of student guided notes with keys. They are appropriate for a high school statistics class or an introductory college statistics course.