An activity where students learn, through modeling and demonstration, about the relative sizes of the Earth and Sun, the distance between them, and how the Earth rotates in a 24-hour period.

The complete text and artwork of a Medieval book known as a "book of the hours". It was a collection of written and visual materials dealing with each liturgical hour of the day. They were hand-made and are quite rare. This example was...

What time was it 2011 minutes after the beginning of January 1, 2011? This task requires division of multi-digit numbers in the context of changing units and so illustrates 5.NBT.6 and 5.MD.1.

In this activity, students will collect temperature and light readings over a 25 hour time period and explore relationships between and within the data. They will discover the relationships of temperature with sunrise and sunset and look...

[Free Registration/Login Required] In this flipchart students will understand how the Earth rotates during a 24 hour period giving us day and night.

Colorful exhibit showcases the actual artifacts used by the Civil War soldiers at Gettysburg. View their camp materials, clothing, equipment, and personal items. Also, like soldiers of all wars, long hours passed when they were not...

Join Max and Ruthie on a snow day math adventure and see how many things can happen in just one day. Teachers will like this lesson's approach to experiencing and telling time. Use the teacher's guide, activity sheet, and extra...

In this activity, students use the TI InterActive! software to develop a model that determines the time of sunrise and sunset and the number of daylight hours in Melbourne on any day of the year. They also determine how the position on...

As early as 1866 a national union grew from the multitude of local unions in the country. Read about the growth of stronger unions, and find out what their goals were. See why the Haymarket Square Riot had an effect on unionization.

Read about the domestic legislation of Woodrow Wilson, a progressive president who won the election of 1912. See how the policies he proposed won him the support of those who believed in the platform of the Bull Moose Party.

The site provides background and texts of numerous poems. Follow the links at the bottom of the page to specific poetry books to find complete text of individual poems.

Industrial workers, as industry emerged and grew in the last half of the 19th century, did not profit as the business tycoons did. Read about the very beginnings of attempts to organize as a force to demand higher wages, a shorter work...

The democratic upheaval in politics exemplified by Jackson's election was merely one phase of the long American quest for greater rights and opportunities for all citizens. Another was the beginning of labor organization, primarily among...

Belding's Ground Squirrels spend almost three-quarters of their lives hibernating in large underground colonies, so they have only three months a year to forage, grow, and reproduce. Females come into estrus on a single day for a few...

A map of Asia from 1872, showing physical features including mountain systems, deserts, lakes, rivers with direction of flow, coastal features, and ocean currents, political boundaries and foreign possessions at the time, and commercial...

What happened at the White House in the hours following the Reagan assassination attempt? NPR provides audio of recently released tapes that capture the events of the day. Website provides a retrospective 20 years after the event.