8th Grade Math Home > Teacher Resources > Notes > Go Fish: Solving Proportions: Overview of the Lesson

Go Fish!
Solving Proportions: Overview of the Lesson

Modeling a Real Life Situation

• By modeling a capture-recapture situation, the students are able to see how proportions are useful.
• They become involved with data collection by capturing samples to find the proportion of tagged fish to the total sample.
• Then they find the mean of the tagged fish and the total from the 10 samples.

Solving the Proportion

• A ratio is used to determine the proportion of tagged to total fish from the samples. This ratio should be similar to the proportion in the total population.
• The following equation is used to solve the proportion and predict how many fish there are in the lake:

 Average # tagged in samples = Total # tagged in lake Average # in samples Total # fish in lake

• Then the students count the true total of fish in the lake and compare that number with their predictions.

 8th Grade Math Home > Teacher Resources > Notes > Go Fish: Solving Proportions: Overview of the Lesson