### Ratio and Proportion

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#### The 8th billion baby

How fast is the world's population growing? Will the world's population size increase indefinitely?  Are all countries' populations increasing at the same rate? What are some of the...

Jennifer Fairbanks from Hopkinton, MA sent us this picture of the cookies that she baked in 4 hours using 13 eggs and 5 cups of sugar. Do you see some math here? Do you have an add...

#### Mental math tricks - part 2

36 x 25 = 900     480 x 25 =12,000    924 x 2.5 = 2,310 Can you see any tricks for doing these calculations in your head? An editable Word docx, solutions/hints, and a PowerPoi...

#### Spider-Man continues

Spider-Man: No Way Home opened on December 17, 2021.   How much did it cost to make? How much will it gross? Is the Spider-Man phenomena a guarantee for success? How would yo...

How big is one coronavirus? How big is a micron? How well do these masks protect against the virus? What can you observe about the size of particles mentioned? Why are we wearing masks?

#### Star Wars ... the story continues

The Rise of Skywalker will open on December 20, 2019.  How much did it cost to make?  How much will it gross? Is the Star Wars phenomena a guarantee for success?  How would you c...

#### Flag Art

A little ratio art might be a fun way to get ready for the upcoming Memorial Day holiday. In this activity (Flags) students measure; create whole number ratios for the official U.S. flag; decide h...

#### Which is the best deal?

How do you calculate and justify which deal is a better savings?  By dollars saved?  By percent saved? By some other measure? Looking at 4 different deals, students will need to...

#### Raising the bar

Recovery of the treasure from the 1941 sinking of the S.S. Gairsoppa was recently completed and a huge amount of silver was brought up from the ocean floor.  Let your students get a fe...