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Free Flights?
Algebra Number Sense
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 ...
data analysis 7.EE.4 HSA-CED.A.2 MP3 MP8 MP.4 7th 8th HS HSA.CED.A.1 relationships equations costs patterns

What's with the plovers?
Algebra Number Sense Science Ratio and Proportion Probability and Statistics
Cute little birds.  Piping plovers are nesting on beaches along the Atlantic coast. Consequently beaches are often roped-off or closed to protect their nests and chicks. Is this conservatio...
Scatter Plot line of best fit data analysis average 7th 8th HS 7.RP.A 8.SP.A HSS.ID.B 7.EE.B 8.EE.C HSA.CED.A

Growth of Facebook

Algebra Number Sense Ratio and Proportion Probability and Statistics
 In this activity, students analyze and graph the numbers and decide if Facebook's growth in the first 20 years has been linear, exponential, meteoric, or something else.  Will the number of...
Scatter Plot percent Business Data exponential growth news growth factor 7.RP.3 HSS-ID.B.6 8.SP.1 8.F.4 7th 8th HS F-LE linear growth F-IF.6

California water measurements - chains, links, and furlongs
Algebra Geometry Science Ratio and Proportion
 Help your students understand what they are reading or hearing about the California drought.  Terms like acre-feet, chains, and furlongs are often used to describe the volume of the reservo...
Data and Probability 6.RP.3 5.MD 6.G 7.RP 6th 8th 5th MP6 drought acre-feet furlong chains water source

Clean Close Shave
Algebra
Take a look at the infographic.  What do you see? What do you think?  What do you wonder? [caption id="attachment_16099" align="aligncenter" width="420"] Image from West Coast Shaving. Click...
6.SP.3 7.SP.4 6.SP.4 7.SP.2 7.SP.1 7. SP.3 6th 7th 8th HS 5th 4th HSS.ID.A.2 HSS-ID.C.9 6.SP.1

Kilauea's lava flow
Number Sense Geometry Science
[caption id="attachment_15749" align="aligncenter" width="500"] Halema‘uma‘u Lights the Morning Sky - Photo taken from the overlook by the Volcano House on January 30, 2014 - NPS photo[/caption] The v...
Data and Probability slope rate 6.RP.3 7.G.1 HSF-IF.B.6 8.F 5.MD.1 6th 7th 8th 5th 8.F.B.4 Kilauea Pāhoa lava flow contour volcano

Saffron and paella
Algebra Number Sense Science Food
In order to cook Paella (a delicious Spanish rice dish) I needed to buy Saffron spice.  It was hugely expensive.  So, I've decided to start a business of growing saffron and becoming immen...
patterns rates 7.RP 8.SP 5.OA Excel 6th 7th 8th HS 5th profit HSS HSN food

The growth of Godzilla
Algebra Number Sense Geometry Probability and Statistics
Image from Kris Holt: http://www.policymic.com/articles/76357/the-scary-way-godzilla-has-evolved-through-the-years-in-one-chart The new Godzilla movie is out at theaters.  ...
similar figures Scatter Plot movies 7.G.1 5.G.1 HSS-ID.B.6 8.SP.1 Growth 7th 8th HS 5th similarity Unit rate linear equations linear relationships

Cost of light bulbs

Algebra Number Sense Science Social Studies Ratio and Proportion Probability and Statistics
 This activity has been updated (2026). See the new activity here:https://www.yummymath.com/post/light-bulb-cost-comparison/ There's a lot of misinformation out there about the cost to consu...
Unit rate estimation environment 6.EE.9 6.RP.3 rates 5.NBT.7 6.EE.1 6.NS.3 8.EE.8 Earth day 6th 7th 8th HS 5th 5.NBT.3 HSF.IF.C.7.B HSA.REI.C.6 climate change slope linear relationships

The Blue Marble
Geometry Science Holidays
  April 22nd is Earth Day. Use this activity to demonstrate the various mappings of our 3-d Earth to a 2-d piece of paper. Students compare maps with this famous photo and check to see which...
geometry 6.G 7.G comparisons nets mapping 3-d representations Earth day 6th 7th 8th HS HSG-GMD.B HSG-MG.A

Scoring Olympic ski jumping
Number Sense Geometry Sports
The scoring rubric for each of the Olympic events is intended to eliminate the possibility of scoring bias from the judges.  Let your students learn more about the scoring of one event and deci...
Data and Probability 5.NBT 6.NS 7.NS 6.EE 7.EE 5.OA HSA-CED 6th 7th 8th HS 5th Olympics ski jumping scoring data analysis integer

HDTV Surprise!
Number Sense Geometry
  How were your holidays?  Your school vacation?  Mine was good. I surprised my family with this HDTV, which I wrapped and hung on our wall.  The size of an HDTV is determined by ...
proportion ratio Pythagorean Theorem scale 7.G.1 HDTV 7.RP.3 8.G.7 7th 8th HS HSG-SRT.C.8
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