# Category: Number Sense

## Pixar versus DreamWorks

Animated films are a billion dollar industry.  The two biggest producers of animated films are DreamWorks and Pixar.  The two have been going head to head for more than ten years now. So how do they stack up to each…

## How long until they collide?

Show the beginning of the video. Stop the video at about 39 seconds. Take guesses from students. After students have worked for a while and you have traveled around and selected some students and their work to share, show the rest…

## Should I replace my toilets?

I’m trying to be more savy about wasting our resources.  I have really old fashioned toilets and I’m trying to figure out if I should invest in saving water.  Can you help me? The activity:  PottyTalk.pdf CCSS: 8.F.3, 8.F.4, 8.F.5, HSF.IF.B.4, HSF.IF.B.6, HSF.IF.C.7, HSF.IF.C.9, HSF.LE.A.2, HSF.LE.B.5

## Powerball jackpot continues to rise in value

One winner last night in New Jersey!  Now the jackpot is back to ONLY 40 million. The Saturday night Powerball drawing is expected to have a winning Jackpot prize of \$415,000,000. Examine compound probability to decide if playing Powerball is worth…

## Double Discount

Wow, check out this sale!  I’m gonna be able to get this great hoodie so cheap!   If I use the promo code what will be the total percent off? The activity: DoublePercentOff.pdf CCSS: 6RP.3, 7.RP.3, HSF.IF.C.8b, HSF.LE.A.1c

## Will college be affordable?

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…

## How did they figure these tips?

Act I:  This restaurant bill has the suggested tips, but they are smudged out.  What should they be?  Consider having students make a fast 5 to 10 -second prediction in their heads. Act II:  Students work – for few minutes…

## 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 17, 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…

## David Price, big bucks per …

David Price, a 30-year old pitcher from Toronto’s Blue Jays, was hired with a 7 year contract to be the Red Sox’s new ace pitcher for \$217 million dollars.  That is the largest amount ever offered to a pitcher.  But…

## 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

## 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?

## 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

## “Go” in the news – man versus machine

March 9th was the first round of the competition between Lee Se-dol, one of the World’s best Go players, and Google’s artificial intelligence program “AlphaGo”.  The first and second matches took place in Seoul, South Korea and so far, AlphaGo…