Did the good people of Survivor (Nicaragua) learn their order of operations? Is there something strange about this immunity challenge?
At a casino, you can choose between two wheels to spin. If you land on green, you win $100. But if you land on red, you go bankrupt. Which to choose? In this lesson, we’ll use equivalent fractions and common multiples to come up with the percent: “how many bankrupts per 100 spins?”
In the previous lesson, For Every Hundred, we learned that a percent really just means “out of 100.” In this lesson, we’ll convert backwards from the per100 to the perONE–the decimal–and will use this to calculate the “percents of” numbers in a range of contexts.
In early 2009, iTunes raised the price of songs by $0.30. In this lesson, we’ll use percent change to answer the question, “Is that a lot?” in everything from shopping to politics.
Is a grading scale the only way to determine a final grade? Is it even the best way? In this short, you’ll be the lawyer for either Bart, Lisa or Milhouse, and will argue for the best grade possible.
In this AT&T ad, we observe a man about to be sworn in as president, and then rewind to the “present day” where his parents first meet on a train. It’s a fine commercial…but is the math correct?
Is the iPad just a scaled-up version of the iPhone? In this lesson, we’ll use ratios & proportions to explore different ways of comparing dimensions, and what it means for shapes to be mathematically similar.
What are numbers, and where did they come from?
In this lesson, we’ll explore the history of numbers, from the origins of counting to the philosophical weirdness of irrationals. Are numbers real, or just figments of our imagination?!
At Papa John’s, should you order a specialty pizza, or is it cheaper to build your own? Is a large pizza always a better deal than a small? In this lesson, we’ll use percents and areas to figure out the best way to order a pizza.
Want to become President of the United States? In this lesson, we’ll explore the math behind the popular vote, electoral college and other voting systems. Sorry, Mr. Nader. Better luck next time.
