Category: Ratio and Proportion

Crazy basketball score

Wow! Look at that score! There were some scoreboard malfunctions in this December 15, 2020, pre-season game. What might have been the final score if this game progressed at this rate? The activity: Celtics&76ers.pdf

Martin Luther King, Jr and social justice

We have 6 activities on Martin Luther King and the movement to a more fair and equal representation of Black lives in America. A timeline of KIng’s life; a timeline of the social justice movement; the history of Jackie Robinson; data on which monuments in the National Mall are most visited; a study of crowd counting; and an examination of the recent changes in the Bears Ears Monument size and the reasons for that change.

How much snow is that?

Start 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…

Earth’s perihelion

On Saturday, January 2nd, 2021, Earth will be as close as it gets to the Sun during its orbit. Shouldn’t that make this the warmest time of the year? In this activity students become familiar with the terms perihelion and aphelion as they calculate…

Winter Holidays – 18 activities

Do I have enough wrapping paper? – Students estimate the size of a gift and decide if the given wrapping paper is going to be enough.  Finally they try to create a rule for determining enough wrapping paper from the dimensions of…

Winter solstice

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-solstice2020.pdf

Wind chill

Students use the National Weather System chart to gauge wind chill, examine the patterns that correlate increasing wind and/or decreasing temperatures, use wind chill numbers to estimate possible wind and temperature factors, and generally become familiar with this sort of interpolation and calculation.

Black Friday

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.

Lots of Cranberries

In this timely activity, students learn about how cranberries are grown and harvested; estimate their size and quantities; and see what they can deduce from published statistics.

Veterans Day 2020

Here are two very different maps about where Veterans live in the U.S. and which states have the largest density of Veterans citizens. What do these two maps make you wonder or realize? How can you explain their comparison?

Leaves are pretty but …

In this activity students see the inverse relationship between number of workers and time to complete the whole job. They graph hyperbolas and consider how long the extreme condition of zero people raking might take to complete the job.  

Ravensburger huge puzzle

Students surmise what the difficulty of a jig saw puzzle entails and use rate calculations to estimate finishing times. They try to confirm whether doubling the number of pieces really increases puzzle completion time by a multiple of four.