Category: Geometry

Chocolates

Valentine’s Day is here again and that means candies and chocolate.  In this activity students approximate the volume (through finding surface area) of three different pieces of chocolate.  The chocolates are shaped like a heart, a bat (for Halloween) and…

Twinkies

Brian loves Twinkies and the news that Hostess is going out of business has upset him terribly.  He needs his Twinkies.  Twinkies last forever.  Right?  He’s going to buy enough for 15 years of Twinkies.  In this activity, students examine…

Is this possible?

Brian Shoemaker, a Newton, MA mathematics teacher, saw this Dunkin Donuts Mazda traveling down the road.  He wondered if that size coffee cup could really have coffee in it.  Wouldn’t the car rock back on its rear bumper? How much…

Penny Wars

Act One: Check out all of the pennies! What questions come to mind? If you want the most money, which container should you pick? What information do you need to answer this question?  What assumptions must you make to solve…

Olympic schedule

I found this graphic online that should help me figure out when to try to watch an Olympic event on any day.  The chart seems a little confusing.  Can your students help me figure it out?

Fish tale, go figure

Whoa!  I have two fish in my aquarium.  Betty, my white goldfish always stays really close to the front wall as she swims towards her food.  However, Stripe, my striped goldfish swims diagonally across the tank to the back top…

Pythagorean Theorem

Use this activity to help your students discover the Pythagorean theorem. Pythagorean theorem work is often skill and drill work with contrived right triangle problems.  In this activity students work with a visual representation of the Pythagorean theorem in order…

Watson save

We can’t get enough NFL.  Check out the video above that revisits a truly great NFL playoff play. In the 2005 AFC divisional championship game between the New England Patriots and the Denver Broncos, Benjamin Watson stopped a touchdown in…

Storm cleanup

This activity could be used as an introduction to trig ratios.  Students figure out the approximate length of the huge branch that I have to fell for safety and firewood. After approximating the branch’s length, they calculate how many logs…

Throwing up again

Anchorage, Alaska has received more than 100 inches of snow this winter.  The height of the tunnel to people’s homes is getting higher and higher. When they shovel an area, they have to throw the snow practically straight up from…

Valentine’s Cardioid

WojciechSwiderski at the Polish language Wikipedia Happy Valentine’s Day!              cardioid.pdf This PDF contains four ways students can draw cardioids for Valentine’s Day.

Largest Cup of Coffee Ever!

The world record for the largest cup of coffee was recently set (see picture above).  In this activity students explore scale, similar figures, volume and measurement as they estimate the amount of coffee that this record-sized mug holds.  Students also…

Why Does it Stay in Orbit?

On Monday, the space shuttle Endeavor launched for the last time. The six astronauts on board docked this morning at the International Space Station to join the 6 astronauts and cosmonauts who live at the ISS. Combine current events, Earth…

Benoît Mandelbrot

        In October, 2010, Benoît Mandelbrot died in Cambridge, Massachusetts. To honor his life and work in fractals and natural recurrence, we’ve created an investigation that teaches students a little about Mandelbrot’s life, a little about the…