Unit 5:


How likely are random events to occur?
3 weeks

Although students have intuitive notions of how probability works, often their naive mathematical understandings miss critical nuances of probability in action. In this unit, the objective is to confront students with their misconceptions of how probability works and then extend their understanding of probability. This unit builds a foundation for working with probabilities. Basic rules of probability are discussed, including conditional probabilities. Extra care should be taken to develop the conceptual understanding of probability, rather than just memorizing a relationship. Instruction through the use of simulations will help build the necessary conceptual foundation for the successful study of probability. The idea of independence is important and often misunderstood. Being able to explain probability in everyday language as well as interpret everyday language into probability statements is a critical skill for mastering these standards. Students should be exposed to multiple representations of information and asked to calculate probabilities from them. Two-way tables, Venn diagrams, and probability trees should be common in this curriculum.

Essential Questions:

  • How can probabilities be used to analyze and make fair decisions?
  • How likely are random events to occur?
Printable Unit Plan
  • Algebra II Unit Plan for Unit 5
    Algebra II Unit Plan for Unit 5

    This is a printable version of the entire unit plan. You can make a copy of it and edit it or download and print it as needed.

Unit Outline

6 Components

Every unit begins with an Initial Task and ends with a Balanced Assessment, both focusing on core mathematics of the unit. The core mathematics is developed through a series of resources around Big Ideas; as you move through the unit, keep students focused on how these ideas are connected and how they address mathematical problem solving. Before attempting the Balanced Assessment, students have an opportunity to synthesize their knowledge through a multi-day Formative Assessment Lesson and teacher-designed re-engagement lessons.

Initial Task See 1 itemHide 1 item

Formative Assessment Lesson See 1 itemHide 1 item

Re-engagement See 1 itemHide 1 item

Balanced Assessment See 1 itemHide 1 item