NY Next Generation Math NY-6.SP.8.a

Math6th Grade

The Standard

Develop a uniform probability model by assigning equal probability to all outcomes, and use the model to determine probabilities of simple events.

New York State Next Generation Mathematics Learning Standards

Teacher's field guide

What Students Need to Do: Students create uniform probability models by assigning equal probability to all outcomes. They use the model to find probabilities of simple events.
What Mastery Looks Like: The student lists all equally likely outcomes and gives each probability 1 over the outcome count. Event probabilities are found by counting favorable outcomes over all outcomes.
Common Misconceptions: Students may assign equal probability when outcomes are not equally likely. They may use favorable outcomes as the denominator instead of the complete sample space.
How to Assess It: Ask students to build a uniform model for a fair six-sided number cube and find the probabilities of rolling 2 and rolling an even number.

Lesson moves

Use equal-sized sections on a spinner to list outcomes and assign each the same probability.
Ask students what evidence makes a uniform model reasonable.
Play Uniform Model Match with fair devices, sample spaces, and event probabilities.
Model a random selection from equally sized raffle tickets and calculate a simple event probability.

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