In this investigation students calculate the percentage of the U.S. population (current and historically) that are enrolled in K-12 schools. They are asked to draw conclusions from these variations. Finally, they use their calculations to predict the number of enrolled…
Catching a productive meteor shower can be a stunning experience. On the evenings and mornings of August 11th and 12th there could be a very good show. A nearly new moon will leave the night sky dark. Depending on the…
These Aussi tomatoes (the tomato on the left of all of the tomatoes) are huge. How much do you guess one weighs? Can you figure it out?
This Monday Americans will celebrate Memorial Day. Who are we honoring? How did the holiday come about? Isn’t Memorial Day usually on May 30th? Students learn a little about the history of the holiday, analyze the possibilities and patterns for when…
Mother’s Day by the numbers – Mother’s Day is right around the corner and this means big business for the greeting card and floral industries. Let your students practice averages, percents, and large numbers while they analyze the statistics on Mother’s…
Sunday, April 22nd is Earth Day – There is so much to bring to your classroom to support recycling, conserving resources, studying climate change and protecting our planet. Have you seen more Monarch butterflies lately? – Students read charts, do a little research, and make observations…
March Madness is the big 68 team college basketball tournament that takes over our TV viewing during the weekends of March. School and office friends are filling out brackets. Engage your students in percents as they get excited about March…
Green, green river – They’re doing it again. In Chicago, the local plumbers union “dye” the Chicago River emerald green. Students learn the meaning of PPM (parts per million) and attempt to figure out how much dye is used to sufficiently…
Tuesday, February 13, 2018, will be the day before Ash Wednesday and the start of the season of Lent. Mardi Gras is a last hoorah and is celebrated throughout the world with feasting, partying, and general indulgence. In New Orleans…
Scoring Ski jumping – The scoring rubric for each of the Olympic events is intended to eliminate the possibility of scoring bias from the judges. Let your students learn more about the scoring of one event and decide whether it seems fair…
Clicking on this image will show it larger in a new window. Hosting the Olympics sure does cost a lot. Why is that? How much money is $5 billion dollars? What is a cost overrun? Why would a country want…
What’s your guess? How fast are the number of daylight hours changing each day? Will the changes be dramatic or subtle? Students make guesses; compute how long, on average, the change in daylight hours should be; play with a cool…
On Wednesday, January 3rd, 2018, 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…
Every year Americans spend lots of money on Halloween and Halloween costumes. Use our updated data on Halloween spending in America to engage your students in an analysis of the ratios and percents of population, participation, and money spent in honor…
How much water is used? How much water could be saved? The activity: PottyTime-SavingWater.pdf CCSS: 5.MD.1, 5.NBT.7, 6.RP.3, 7.RP.3, MP2