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How big of a crepe can you make?
Algebra Number Sense Geometry Math and Food Ratio and Proportion
At Costco you can buy this huge tub of nutella.  It contains nearly 7 pounds of chocolaty-hazelnut spread. We use nutella to make banana/nutella crepes.  How long will that tub last u...
proportions diameter ratios 6.RP 6.G 6th 7th 8th 5th 7.G.B circles HSG 9th circle area 8.G.C nutella

Lighting the 2022 Olympic Torch
Algebra Geometry Math and Science Sports Holidays and Annual Events
On October 18th, 2021 the Olympic Torch was lit in Greece.  It was lit without the help of a flame or a match.  It was lit by concentrating the rays of our Sun. From Olympi...
geometry circle focus model angles 6th 7th 8th HS 5th 4.G.1 4.G.3 7.G.2 parabola Olympics

Will one roll be enough?
Number Sense Geometry Holidays and Annual Events Ratio and Proportion
Students can use the man or the basket as a reference as they try to approximate the size of these gifts and how much wrapping paper will actually be needed. Approximation, surface are...
7.NS 7.RP 7.G 6.EE 7.EE MP1 MP3 6th 7th 5th 6.G.A MP4

What can you tell about a snowflake?
Geometry Math and Science Math and Art
As a snowflake falls from the sky, its crystal grows according to the humidity and temperatures of the air that it passes through. In this activity, students interpret a graphic that clarifies ...
7.G MP1 8.G 6th 7th 8th HS HSF 6.G.A HSG.CO visual representations graphics

Wrapping presents on the diagonal
Algebra Number Sense Geometry Holidays and Annual Events
 Dr. Sara Santos is a popular mathematician and speaker on mathematics.  She has worked out a method for wrapping boxes (rectangular prisms) as efficiently as possible. (W...
geometry Christmas Pythagorean Theorem 8.G.7 7.G.6 MP3 nets MP.4 6th 7th 8th HS 5th HSG-SRT.C.8 HSG.MG.A.3 Holidays climate change pollution

2 New Macy's Parade balloons
Algebra Number Sense Geometry Holidays and Annual Events Current events Ratio and Proportion
As the Macy's Parade returns to public viewing, here are two balloons that Macy's artists have added. Can you figure out their dimensions? Macy's give their dimensions in bicycle lengths, taxi w...
5.MD 7.RP 6.SP 8.G 6th 7th 8th HS 5th 7.G.B 6.RP.A 7.G.A Macy's Parade

Betsy Ross's 5-pointed star
Algebra Geometry Math and Social Studies Math and Art
Flag of the United States from 1777 to 1795.    In honor of Independence Day we thought it would be fun to look at one story about the first American Flag. The rough desig...
8.G 6th 7th 8th HS 5th 7.G.B 4th of July pentagram HSG.CO flag

How much snow is that?
Algebra Number Sense Math and Science Ratio and Proportion
Start 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?  H...
Data and Probability estimation 7.G 6th 7th 5th 6.RP.A 7.RP.A 5.MD.C 7.EE.B unit weight snow-water equivalence (SWE) 7.EE.A weather snow Volume

December 21, 2020 - Great conjunction
Algebra Number Sense Geometry Math and Science Current events
Right now, just after sunset, in the southwest sky, you can check out the planets of Jupiter and Saturn as they get closer and closer to each other. They are millions of miles apart but they app...
rate of change 4.MD 7.G MP3 6th 7th 8th HS 5th 4th circles MP6 apparent diameter HSG.C central angle 8.F.B HSF.IF.B astronomy

Monster cake
Number Sense Geometry Math and Food Ratio and Proportion
Jodie Berman, a high school math teacher in Chicago, loves mathematics and loves to cook.  We've created an activity based on her Monster Cake (composed ...
Fractions measurement percent estimation Volume 6.RP 7.RP 5.NF 7.G.6 surface area 6.G.4 6th 7th 5th 4th circle area food
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