What is a quantum dot?


In this activity, students work through the nomenclature to understand the possibilities of nano science and quantum dots.  Questions that are answered; How many nanometers are in a millimeter? What is a semiconductor? What and why does this nano technology increase our ability to closely examine, understand and modify our tools?

The activity: Quantum-dot.pdf

Veterans Day, 2023

On Veterans Day we honor the men and women that have served in the Armed Forces of the United States.  There are now 16.2 million living veterans. We found these maps that show where veterans live in the U.S.

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What do you notice and what do you wonder when seeing these maps?

2023 World Cup Cricket

The Cricket World Cup is being played now (October 5 to November 19, 2023) in India. This is a complex game that is played with enthusiasm and humor.

In this activity students learn about the game; watch a couple of videos on how it is played; calculate the number of matches that must be played; try to reason how to count the matches in a more abstract manner; and decide whether the unusual organization of the matches seems fair.  Tons of good math while learning more about this worldwide game!  

DST ends November 5th – strange happenings

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In this activity students try to figure out how time settings will change as they move from place to place and in the serious weirdness of Arizona and the Navaho and Hopi nations.  What variables are involved in the daylight savings time shift. Location? Day length? Latitude?

The activity: DaylightSavingsTimeHours2023.pdf

Yummy Pumpkin Pie

pumpkin-pie1I make the best, best, really best pie.

Every year more and more people come to our house on Thanksgiving morning for my famous pumpkin pie and a hike in the nearby woods.  This year 23 people have already accepted.  How many pies should I make?  How much of each ingredient will I need? What quantities should I buy at the grocery store?  Engage your students in estimation, multiplication of fractions and proportional reasoning.

14 ideas for Halloween

How well can you predict your candy haul? - Students consider how to determine their best predictions of their candy wealth. The math ideas of measurement error and percent error are introduced.  Students then predict their own Halloween candy collection numbers and compare their predictions to their actual haul using measurement and percent error.

Halloween Participation - Updated! Every year Americans spend lots of money on Halloween and Halloween costumes. Use our data on Halloween spending in America to engage your students in an analysis of the ratios of population, participation, and money spent in honor of October 31st.

Collecting the most candy - We’ve created an activity that asks students to calculate the volume of candy containers that are regular, silly and intriguing.  Skip the cone and the sphere to make this activity more useful for 5th or 6th graders or include the whole activity to challenge with a little bit of percent work.