Category: Ratio and Proportion

Martin Luther King, Jr. (5 activities)

Data on the National Mall sites – Two data analysis activities about the National Mall. Who do we honor? – What people or events are included in the National Mall monuments? Students use fractions or percents to decide what they can notice…

It’s Girl Scout cookie time again!

Totally new activity! Let your students talk about their favorite Girl Scout cookies as they figure out what the local GS chapter really earns from these sales.  Use this old graphic (where a box only costs $4.00) to figure out…

Wanna work for Uber?

Students examine the ads and decide what is and isn’t said. Do the ads give enough information to make a decision? Which is the better deal? How do you know?

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 compare these movies? We’ve been gathering data…

Shipping crunch

Do huge numbers of packages shipped and huge numbers of packages delivered late mean that these two companies aren’t doing a good job? Talk numbers.

It is getting dark way too early now

Students appreciate how their latitude effects the darkness of their late afternoon location as they study the earth’s tilt and the logic of daylight hours. Is latitude the central angle of the Earth? The activity: winter-solstice2019.pdf

How much snow is that?

Start out this activity with: What do you notice? What do you wonder? How many inches of snow produced that pile?  How much snow in volume is on top of the car?  How much could that snow weigh? Students try to approximate…

The Forever Roll

Why would anyone need such a big roll of toilet paper?  How does it compare to Charmin’s other toilet paper products? If this roll lasts for one month, how big a roll would I need to be able to last for one year?

Black Friday deals

When shopping next Friday, students will be able to add some understanding and analysis to the trip after calculating savings in dollars and percents with this timely investigation.

Macy’s has some new balloons

These giant beauties can be measured in handler height, taxi cab widths, stories tall, and bicycle lengths.  What does that all mean?  How big are these balloons. The activity: Macy’sNewBalloons.pdf

Not enough mashed potatoes

Using his famous mashed potato recipe, Brian has asked students to change decimals to fractions, to calculate ingredient measures for various-sized Thanksgiving gatherings, to explain their thinking in calculating these figures and to judge how many servings could be created…