Whether you or one of your siblings is going off to college next fall, it is useful to know how much colleges cost. Not going to college this fall? No worries, we can use the information on college costs in…

# Algebra

These posts help students see patterns and relationships.

# Where do those convention delegate numbers come from?

We hear nightly about who won delegates in state elections. But different states have different numbers of delegates. How is that figured out? Is it fair? The activity: Delegates.pdf Here’s a calendar of the nomination process: ElectionCalendar.pdf

# The Boston Marathon

Monday, April 18, Patriot’s Day, is the next running of the Boston Marathon. What do you know about marathons? What do you know about the Boston Marathon? How long do you think the marathon is? Make your best guess. How…

# Figuring planting dates

It’s time to get ready to plant my garden again. But here in Boston we have to start our seeds indoors to give them a head start before we can put plants outside. How should I figure out when to plant my…

# Which is the best deal?

How do you calculate and justify which deal is a better savings? By dollars saved? By percent saved? By some other measure? The activity: WhichDealOffersMostValue.pdf CCSS: 4.OA, 4.NBT, 4.MD.A, 5.NBT, 6.RP, 6.EE, 7.RP, 7.EE.A

# April Fool’s Day perplexors

We have two classic puzzles for your April 1st class starters. PerplexingOne.pdf PerplexingTwo.pdf CCSS: MP.1, MP3,4.OA, 5.G, 8.EE, 8.SP For members we have solutions. PerplexingOne-solution.pdf PerplexingTwo-solution.pdf Or you might baffle and amaze your students with our Ghost Whisperer lesson.…

# How much do the tickets cost?

Ooops! I was supposed to buy 4 adult and 2 children tickets, but I accidentally entered four children and two adults … 🙂 Can you figure out how much a child’s ticket and an adult ticket actually cost?

# The perfect bracket

Sunday night, March 13th, is Selection Sunday. Now the March Madness bracket predictions can begin. What are your chances of picking every game? How does the change from 64 to 65 to now, 68 teams in the field complicate things? How…

# Pi Day

March 14th is almost here ! Celebrate π in your school and in your math class with activities that demonstrate how π was derived; visually show why π makes sense; show a surprising place where π is used; increase students ability to…

# How much snow is that?

Start out this activity with: What do you notice? What do you wonder? How many inches of snow produced that pile? How much snow in volume is on top of the car? How much could that snow weigh? Students try to approximate…

# Movies and the upcoming Oscars

We’ve got 11 Oscar and movie activities. Highest Grossing Movies – Let your students develop their own ideas about compounded percent change while they have the opportunity to speak about the upcoming Academy Awards show. Worldwide box office income is compared for the…

# Who can play in this play area?

We visited a Chic-fil-A recently. We had a great meal and my son loved playing in the play area. While at the play area I noticed two different signs that gave the…

# Giant Snickers bar

Wow! This snickers bar is huge! Act 1 – Big question = How many times bigger than a regular Snickers bar is this? What info would you like to know? How are you going to judge how much bigger this is…

# Valentines and Presidents days

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. Chocolate-raspberry heart-shaped cake – Students build a heart cake and use ratio information…

# Super Bowl, Mardi Gras, Lunar New Year, and Groundhog Day (14 activities)

How have the cost of Super Bowl ads changed? – Students analyze and graph our data of all of the previous Super Bowls and decide whether the change in ad cost is linear, exponential, or something else. Then they predict the…