Should I buy the BIG one?

PotBellySandwiches copy

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 Let your students decide if the BIG one is a fair deal.  Click on the pic to enlarge and post on the wall.  Have kids a pick a sandwich.  Which size will they get?  Which size is a better deal?  Make a guess, then do the math...

The activity: PotBelly.pdf

Wow! Only 10 cents!

All the ice cream that you can eat for only 10 cents!  Wow, that's a great deal!  Or is it?

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The history of the Dairy Queen franchise began with this ad in Illinois in 1938.  I know that 10 cents was worth more in the past. But was it worth enough even then? How much would that all-you-can-eat ice cream special cost today?  

Free Flights?


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This can't be right!  If my flight cost $200 and I stayed for 10 days it would be free.  Right?  You can kick off this activity by asking students to think about where in the world they would love to travel to.  Kids can then look up flights to that destination from their area airport.  Don't have students use the promo code, just have them work out the discount by hand assuming it is $20 off per day of travel.  You might have students organize their work (or you can help them see a more organized version of their thinking) where through repeated reasoning (MP7) they notice the cost of the flight - 20 x number of days = final cost.  Are there different rules to represent this situation?  What do our variables represent in the context of this situation?  

New Horizons spacecraft observes Pluto

The New Horizon space probe was launched from Cape Canaveral on January 19, 2006. It has now come close to Pluto and has sent its first close-up images back to Earth.


Clicking on this image will take you to the NASA site where the instruments are defined.


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The spread of Lyme disease


With the start of summer and wonderful outdoor activities, it might be good to examine the growth of Lyme disease occurrences in the United States.  The Center for Disease Control and Prevention (CDC)  has a wonderful map that you can use to show where Lyme was in 2001, 2002, etcetera through 2013.  For the math part you can study the rate of growth numerically and graphically.  So this math activity might encourage you to be careful and stay healthy.