Category: Geometry

Collecting the most candy!

Use your student’s Halloween enthusiasm to do a study on volumes.  We’ve created an activity that asks students to calculate the volume of candy containers that are silly and intriguing.  Skip the cone and the sphere to make this activity…

Steepness and fall hiking

Fall is a beautiful time of year for hiking. Many students will be walking in the woods and mountains to enjoy the colorful leaves and the cool weather outside.  Let them combine what they are doing with their families and…

Pascal’s Triangle coloring and Probability

Working with Pascal’s Triangle offers some interesting and varied mathematics.  We love to color and the end results are prettier than most math homeworks.  Here is the second of 3 activities using Pascal’s coloring. Pascal’s Triangle and Probability – This activity…

Fall equinox

Thursday, September 22nd of this year will be the Autumnal Equinox.  It is the time of year when the imaginary plane that might pass through the Earth’s Equator would also travel through the center of the Sun.  At this auspicious…

Big Aussie tomato

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?

Monster cake

Jodie Berman, a high school math teacher in Chicago, loves mathematics and loves to cook.  We’ve created an activity based on her Monster Cake (composed of everything that Cookie Monster loves) from her blog Binomial Baker.   Students find the surface…

Lighting the Olympic Torch

The 2016 Summer Olympic games won’t begin until on August 5th of this year but already the Olympic Torch has been lit and is traveling to the game’s site, Brazil, by 12,000 relay participants. Watch the lighting video and wonder…

Flag Art

A little ratio art might be a fun way to get ready for the upcoming Memorial Day holiday.  In this activity students measure; create whole number ratios for the official U.S. flag; decide how our artistic flags will be different…

What’s my angle?

I’m going to help save the planet by adding solar panels to my roof! Should I tilt the panels on my roof to more accurately aim towards the Sun? If so, at what angle should I use? Should I be…

Giant chocolate bunnies

Topper Chocolate Easter Bunny from Dilettante Chocolates. What can you deduce about the bunnies (pictured in this activity) from the descriptions given … solid? hollow? cost per pound? cost per height? Anything else? The activity: GiantChocolateBunnies.pdf

Pythagorean Triples + coloring

Pythagorean triples are not only handy for students to recognize but produce some interesting and lovely patterns.  We’ve combined a little coloring with our Pythagorean Triple pattern investigation to let your students relax while they color, view the beauty, and…

How Many Pennies did Otha Save?

Otha Anders used picking up pennies as a way to remember to pray.  In this 3-act activity we try to estimate how much he actually collected and stored in 5 gallon water jugs.  Kick off the activity with the article with…

Hexadecimal colors or paint by number

Probably most of us have heard of and even used hexadecimal color codes. Don’t you wonder why their number descriptions really make sense? In this activity we first ask students to color in our Golden Spiral by giving them the…

Rescue of the Chilean miners – The 33

On August 5, 2010, the San Jose copper-gold mine near Copiapó,Chile collapsed stranding 33 miners in a large cavern more than 2,000 feet below ground. A new movie has just been released about the incident, The 33. All of the…