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I need help raking my leaves
Brian has spent too much time thinking about his leaves. He's worried about raking them alone and thinking about how long the job would take if people helped....
Algebra
Number Sense
Grades 5–HS
Inflation and the cost of gasoline
In 1980, one gallon of gasoline costs $1.22. Today's prices are a lot higher. Is that because the price has gone up or because in 1980 you could...
Algebra
Number Sense
Grades 5–7
Do teams that spend a lot win a lot?
In this activity students compare team wins with team salaries in the four major North American sports ... the NBA, NFL, MLB and NHL. Students use data from...
Algebra
Number Sense
Grades 6–HS
What's your favorite sport?
What is your favorite sport? Wait, do I mean your favorite sport to play or your favorite sport to watch? Does it matter? Are your favorite to-watch sport...
Algebra
Number Sense
Grades 5–HS