Category: Algebra

These posts help students see patterns and relationships.

I bought toilet paper online

Students use the pictures in this activity to approximate the size of this 16 roll package of bamboo toilet paper. They use comparison ratios with our Ruth Bader Ginsburg doll to calculate the size of one roll and then calculate the size of 16 rolls. Funny activity.

A socially-distanced party

I risked infecting my friends or becoming infected myself by throwing a very small socially-distanced party.  I served baked appetizers, disinfectant wipes, and latex gloves.  I cooked while wearing clean latex gloves and served the appetizers with a spatula.  The…

Memorial Day 2020

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…

Fish tale, go figure!

I have two fish in my aquarium.  Betty is my white goldfish. She often stays really close to the front wall as she swims towards her food. Stripe, my clownfish, usually swims diagonally across the tank to the back top…

Mother’s Day math – 13 possible activities

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 Day spending.  You could even…

Sadly, Jorge passed away yesterday.

Jorge would have been 15 years old on May 5, 2020. We wondered how old that would have been in human years. Does that 7 times his dog years formula really predict all dog’s aging?

Microns and Masks

How big is a coronavirus cell? How big is a micron? How well do these masks protect against the virus? What can you observe about the size of particles mentioned? Why are we wearing masks?

Stock Market headlines – Biggest losses since 2008

Biggest losses since 2008 – The Dow is measured in points but this decline can also be measured in the percentage lost.  Which way was the Dow being measured when this headline was produced?  Which method makes more sense? Wasn’t the initial value of the Dow much lower in 2008?

World record Snickers Bar

This World Record Snickers Bar was created in late January at the Waco, Texas Mars Wrigley Plant. What proportions would be an accurate cross sections of this monster bar? How many Mars Wrigley workers would this feed? How are your calculations different from what was published? How must their calculations have differed from yours?

Weird and spooky puzzles for April Fool’s Day

This day is known for pranks and puzzles.   Try one of these 4 activities on April Fools Day. Ask students to analyze where I made my mistake        PerplexingProblem.pdf For members we have solutions. PerplexingProblem-solution.pdf      …