### Ratio and Proportion

We found 134 post available for you

#### It's almost summer now

How much water do you have to drink?   In this activity student develop formulas for calculating their water needs, learn about the effects of too little wat...

#### Mother's Day

How much do we spend on Mother's Day - Use the Mother's Day event to engage your students in approximating, reasoning, and investigating as students estimate how mu...

#### Will I pay less if I buy more?

image designed by macrovector / Freepik This activity can be used in a large range of grade levels.  Your class can work on percents, ...

#### 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 millime...

#### 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 liv...

#### Heating with wood - What's a cord?

Do you know what a cord of wood looks like? What size stack is that? What's a thrown stack? What's the dog's name that is standing in front of the wood? How long can I heat my house with that much fue...

#### More Population Pyramids

The population pyramid above shows the distribution of the World by ages and sex for each continent. How can that information help you put your vision of the world in better perspective? &nb...

#### The Moroccan Earthquake and the Richter scale

Friday evening, September 8th, a powerful 6.8 magnitude earthquake hit Morocco southwest of Marrakech. What does a 6.8 magnitude earthquake mean?  How powerful was that...

#### Little Amal walks across the United States

With our world in so much turmoil and refugees trying to survive hardships by traveling away from their homes, the story of Little Amal is powerful, timely, and touching. Of course there is a lot...

#### Hurricanes again

Updated In this updated hurricane activity, we've ask students to examine the Saffir-Simpson hurricane wind scale and consider what other elements besides this ranking may contribute to t...