7.SP.C.7 lessons
Develop a probability model and use it to find probabilities of events; compare probabilities from a model to observed frequencies and explain possible sources of discrepancy. (Uniform models; non-uniform models from observed frequencies are only touched on.)
The Common Core State Standards for Mathematics code 7.SP.C.7 asks students to: “Develop a probability model and use it to find probabilities of events; compare probabilities from a model to observed frequencies and explain possible sources of discrepancy. (Uniform models; non-uniform models from observed frequencies are only touched on.)” These Fieldbook lessons teach it hands-on, with everyday materials, a printable teacher guide and a student sheet.
Is It Fair? Chance and Probability Grades 6–7 · partly supports this standard
- Is a six harder to roll? 50–60 min
Teams roll a die 30 times and get lopsided results, then pool the whole class's rolls and watch every face settle close to one-sixth. Students place events on a probability scale from 0 to 1, write probabilities as fractions, decimals and percents, and explain why experimental probability gets closer to theoretical probability with more trials.
- Which bag would you pick from? 50–60 min
To win a prize you must pull a red counter from one of four bags. Teams find that the bag with the most red counters gives the worst chance, and that two bags with different numbers of counters give exactly the same chance. Students find and compare probabilities, use the complement, and test their predictions by drawing with replacement.
- Why does horse 7 always win? 50–60 min
Teams play a horse race where horses numbered 2 to 12 move when the sum of two dice matches their number. Horse 7 wins again and again, and horse 2 and horse 12 hardly move. Students build the 36-outcome sample space in a table, find probabilities of compound events, and explain why sums in the middle are more likely.
More Common Core standards for Grade 7
All standards we teach · Curriculum alignment by state and province
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