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Why Do We Have a School Summer Vacation?

6/3/2022

Jim Whiting
The Running Encyclopedia

Chances are you are eagerly looking forward to the last day of school and nearly three months of free time.

Chances are also that you heard that this nice long summer vacation is somehow connected to the early years of the country when agriculture was the most important industry and kids had to help out on their farms during this time. If so, you heard wrong.

For starters, there wasn’t much to do on farms in the summer. The busy times were spring (planting) and fall (harvesting). As a result, most farm kids went to school during the summer and winter. At best they spent a total of six months learning the three Rs.

It was a very different situation in cities as the country became increasingly urbanized. Big-city kids might spend as much as 48 weeks in class, with a week off every 12 weeks. Since attendance wasn’t mandatory, though, they probably only attended school about as much as they do now.

But if so many kids were playing hooky, reformers said, why bother keeping schools open all year? Some doctors backed up the idea of closing for a period of time, saying that keeping kids cooped up for most of the year wasn’t good for their health.

So education officials decided to eliminate the summer quarter. The first reason was that schools were not air conditioned back then and almost unbearable during heat waves. Also, there was also a strong belief that summer was the time when epidemics of serious diseases such as polio got started. Many people thought having so many children packed so close to each other in classrooms helped spread the illnesses. Third, upper-class and middle-class families often took vacations during the hot months.

With increasing mechanization on farms and many farm families moving to the cities, helping with planting and harvesting wasn’t as important. Farm states added those spring and fall months to the school year and gave kids the summers off, just like big-city folk.

However, some research suggests that the “summer slide” causes students to lose an average of a month of learning. Students typically don’t do as well on tests in the fall—after the long summer break—than in the spring when they’ve been in school for several months. Most other developed countries spend more time in the classroom and generally do better on standardized testing. As a result of these factors, a few states are considering lengthening the school year from the current 180 days to 200.

What do you think?

Jim Whiting hopes all of you have a wonderful summer and that you can carve out some time to read! Your local library may have some of his books, as well as many by the other wonderful authors who have made the Nonfiction Minute such a great success. And be sure to check out Jim's updated website, www.jimwhiting.com

MLA 8 Citation
Whiting, Jim. "Why Do We Have a School Summer Vacation?" Nonfiction Minute, iNK Think
Tank, 15 June 2018, www.nonfictionminute.org/the-nonfiction-minute/
Why-Do-We-Have-a-School-Summer-Vacation?

All of the iNK authors will be working over the summer to create new Minutes for next year. We will be posting three lists of 10 Minutes for the Summer. It will highlight each of our wonderful authors. The first Summer Minutes will be published on June 23rd, tghe next on July 20 and the final list before the school year starts on August 10th. Make it a wonderful summer and every Minute!

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Earth's Emergency Heat Valve: The Hurricane

6/2/2022

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Vicki Cobb
The Master Chef of Kids' Hands-on Science

Earth has a problem. The sun creates hot spots over land, in the air and in the water. That’s why there are winds, weather, and currents in the ocean as Earth tries to even out the heat, moving warmer masses of air and water to cooler areas.

During hurricane season ( from June 1-November 30), only 10 or 11 of the 80 tropical disturbances off the west coast of Africa (where most of our hurricanes originate) become large enough storms to be given a name. Only two or three of them hit the United States. They are not frequent but they are massive wind storms that can destroy life and property.

Do they do anything good at all? As far as the Earth is concerned, these largest of all storms are a safety valve to rapidly move heat that has been accumulating in the oceans up to the stratosphere (from 7 to 31 miles above the Earth’s surface). From there it will be transported through the air to over the North Pole. It’s the way Earth stops a fever.

Once a hurricane forms, it must have an ocean surface that is at least 80°F to keep moving and to grow. Under the storm, huge amounts of warm water become water vapor. Warm moist air rapidly rises through the spinning winds of the hurricane, up to the stratosphere. When moist air reaches the frigid (-70°F) stratosphere the water vapor quickly condenses to liquid water (rain) releasing its heat. This heat makes surrounding air molecules move faster forming winds.

How do hurricanes cool off the oceans? How do they move the heat? Here’s a clue: Wet your finger and wave it in the air. How does it feel? Pretty cool, I bet! That’s because the heat from your finger changes liquid water into water vapor (a gas) as your finger dries. Water vapor molecules store this extra heat. They rise because they are lighter than other air molecules.

So, a hurricane is a heat engine that moves water vapor from the ocean’s surface high enough to condense back into liquid water and release heat safely to the stratosphere forming rivers of wind that move it to the poles.

Scientists predict that global warming will increase the number and the power of the hurricanes as the ocean surfaces become increasingly warmer during our summers.

This diagram of the anatomy of a hurricane shows the direction of the winds. The blue represents cold air descending while the pink shows warm moist air rising. The outflow surface clouds form as water condenses into a "table-top" cloud, releasing heat that becomes wind. Kelvinsong via Wikimedia

Hurricane Isabel (2003) as seen from orbit during Expedition 7 of the International Space Station. The eye, eyewall, and surrounding rainbands, all characteristics of hurricanes, are clearly visible in this view from space. Image courtesy of Mike Trenchard, Earth Sciences & Image Analysis Laboratory, NASA Johnson Space Center

Vicki Cobb's How Could We Harness a Hurricane? offers questions and provides new points of view that may just change peoples' thinking by showing young readers the work scientists and engineers are doing to avoid future disasters. The book includes hands-on experiments that make science fun, be it at home or in the classroom. Here's a link to the book' s Trailer.

How Could We Harness a Hurricane was named a 2018 Best STEM Book K-12 by the National Science Teachers Association and the Children's Book Council.

Vicki is a member of iNK's Authors on Call so you can invite her to your classroom via iNK's videoconferening Zoom Room. Click here to find out more:

MLA 8 Citation
Cobb, Vicki. "Earth's Emergency Heat Valve: The Hurricane." Nonfiction Minute,
iNK Think Tank, 24 Apr. 2018, www.nonfictionminute.org/
the-nonfiction-minute/Earths-Emergency-Heat-Valve-The-Hurricane.

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Watch a Webmaster at Work!

6/1/2022

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Laurence Pringle
celebrating nature, inspiring good writing

This summer, you may be able to observe an amazing event in nature. You can watch a small animal build a structure much bigger than itself, using materials from inside its own body!

          This is what happens when a spider spins a web. Inside a spider are glands that can produce seven different kinds of silk. The silk comes out of little spigots, called spinnerets, at the rear of the spider's body.

A strand of spider silk is stronger than a similar strand of steel, and spiders use this amazing material in many ways. If they catch an insect, they may wrap it in silk, to eat later. Female spiders enclose their eggs in a silken sac to protect them. And some spiders—almost always females—make webs that are death traps for insects.

Webs can be in the shape of funnels, sheets, or domes, but the best-known are called orb webs. From an orb web's center, lines of silk radiate out in all directions, like the spokes of a bicycle wheel. After building this basic structure, a spider goes round and round, laying down ever-bigger circles of silk. Some of the silk threads have sticky glue to catch a moth or other prey. A spider can create this whole complex design in an hour or less.

          When an orb web is complete, some kinds of spiders wait right in the center. Others hide at an edge. Either way, the builder keeps a front leg in touch with the web. Vibrations from the threads tell a spider whether prey has been caught.

          Spiders often have to repair their webs, and some species routinely build a new one every day. And they recycle! They eat most of their old web. After digestion, it becomes brand new silk for the next construction job.

          You may be able to watch a spider on the job. Look for webs in a field, park, or backyard. Also look for webs near doors, windows, or on a porch. The nighttime lights from such places attract night-flying insects, and spiders often build webs there. They may or may not be orb webs, but watching any kind of spider at work on its silken insect-trap can be fascinating fun.

          And remember: the spider wants nothing to do with you. It is just trying to stay safe and catch some food.

This video was shot by Ingrid Taylor, " I shot this a few minutes after the rain subsided, when the City of Spiders outside the door came to life. Mass web-building and repair going on..." wikimedia commons

.To learn more about the lives of spiders, and see spectacular realistic illustrations, see Laurence Pringle's book:

MLA 8 Citation
Pringle, Laurence. "Watch a Webmaster at Work!" Nonfiction Minute, iNK Think
Tank, 14 June 2018, www.nonfictionminute.org/the-nonfiction-minute/
Watch-a-Webmaster-at-Work.

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Why Do We Have a School Summer Vacation?

Earth's Emergency Heat Valve: The Hurricane

Watch a Webmaster at Work!

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