Author: Leslie

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…

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…

It’s Girl Scout cookie time

Have you ever wondered how the income from Girl Scout cookie sales is distributed to the individual girls, to their Troops, or to the organization? In this activity students learn a little about the organization of the Girl Scouts, try to…

How much did the temperature change in Boston?

It’s been a crazy winter of extremes through much of the United States. Here’s an article, from the February 17, 2016 Boston Globe Newspaper by Matt Rochereau, with the degree swing whited out.  Have your students determine the temperature increase…

Share the LOVE contest

Win a year of YummyMath!  Send us your poem, a photo, a video, or a paragraph that shows why you or your students like our work or how we’ve helped your class.  We’ll share the best, and be giving away YummyMath pencils,…

Pythagorean Triples + coloring

Pythagorean triples are not only handy for students to recognize but produce some interesting and lovely patterns.  We’ve combined a little coloring with our Pythagorean Triple pattern investigation to let your students relax while they color, view the beauty, and…

Data on the National Mall sites

Activity #1 – Look at the individuals who are memorialized on the National Mall and using fractions or percents decide what you can notice about those we honor.  If you would like to show images of the monuments and memorials to…

Hexadecimal colors or paint by number

Probably most of us have heard of and even used hexadecimal color codes. Don’t you wonder why their number descriptions really make sense? In this activity we first ask students to color in our Golden Spiral by giving them the…

Soda Menorah

Happy Holidays! This Soda Menorah was on display in a Florida Target store.  It is made up entirely of 12-packs of Coca-Cola products. What questions do you have? Start out the activity by giving kids a minute or two to…

Not enough mashed potatoes

Using his famous mashed potato recipe, Brian has asked students to change decimals to fractions, to calculate ingredient measures for various-sized Thanksgiving gatherings, to explain their thinking in calculating these figures and to judge how many servings could be created…

Nashville presentation

We had a great time presenting at the NCTM conference in Nashville this morning.  Here is a pdf of our powerpoint presentation.  Fun! RichTasksPresentation-Nashville,TN.pdf

Rescue of the Chilean miners – The 33

On August 5, 2010, the San Jose copper-gold mine near Copiapó,Chile collapsed stranding 33 miners in a large cavern more than 2,000 feet below ground. A new movie has just been released about the incident, The 33. All of the…