What do you wonder about these recipes for coloring? What would happen if I used the wrong recipe (i.e. cake mix instead of egg dying) for coloring my eggs? Do all of the recipes (cake, icing, and eggs) have basically…

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…

Use the need for cleanliness during flu season to engage your students. Does it really matter whether you kill 99.9% of the bacteria or 99.999% of the germs? In this 3-act activity we’ve asked students to consider whether these claims…

Friction, score-keeping, trajectory and weirdness are the main concepts in this activity. Curling is not a well-understood sport but the science and strategy are easily understood and enjoyed. Let your students watch this video to get a feel for the…

Will we have a 29th of February this year? How can you tell? Students work with a flow chart to deduce what years are going to be leap years. They learn about the exact measurement of a solar year and…

Graphic generously supplied by GraphicNews.com Starting February 18th a new Olympic sport will be televised … Big Air Snowboarding. Some of your students may be officianados of snowboarding. Using this activity could be an opportunity to let those students shine.…

Which Sweet Heart candies are the best deal? – Students decide which quantity of Sweet Heart candies is the best deal. Ratio tables, unit ratios, devising convincing arguments. 6.RP.2, 6.RP.3, 7.RP.2 Sweetheart Candies – unit rate and ratio activity using those little candy…

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…

When the weather person talks about wind chill did you ever wonder how they calculate that number? In this activity students use the National Weather System chart to gauge wind chill, examine the patterns that correlate increasing wind and/or decreasing…

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…

On Saturday evening, December 31st, 2017 at 12:59 pm, much of the world will be watching the iconic Times Square Tower’s New Year’s Eve ball drop 141 feet to the roof of the One Times Square Building in Manhattan, NY. This…

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 a present’s…

Tuesday evening, December 12th, is the first night of Hanukkah this year. I think it was much later in December last year. Why isn’t it always on the same date? Students look at the Hebrew calendar and appreciate the incredible mathematics…

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-solstice2017.pdf

Daylight Saving time is controversial, disruptive, useful, saves energy, increases energy consumption, is inconvenient … Imagine locations where neighbors are differentiated by one or two hours and experiment with how the hours of those neighbors will be different. DaylightSavingTimeHours.pdf