Readers respond to a Page A1 article about the lack of class attendance at Harvard. Also: Canceling a report on threats; ...

In case you've faced some hurdles solving the clue, Class that might require a calculator, we've got the answer for you. Crossword puzzles offer a fantastic opportunity to engage your mind, enjoy ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

Calculators are essential classroom tools, enabling students to perform complex math operations accurately and efficiently. However, equipping an entire class with quality calculators represents a ...

Do you consider yourself to be middle class? The definition of America's middle class is not totally clear; however, the Pew Research Center defines the middle class as those whose household income is ...

With a median income income hovering around $75,000 in the United States, some of the shrinking middle class is moving to the upper class. The share of income held by the middle class fell from 61% in ...

How much do you need to earn to be considered middle class in Ohio? Defining the middle class is more complicated than it may seem, especially since the United States Census Bureau does not have an ...

Making the middle class in Pennsylvania is getting harder as the national average is growing. The middle class is a socioeconomic group that falls between the working class and the upper class. They ...

Making the middle class is tougher in New Jersey than nearly every other state. The middle class is a socioeconomic group that falls between the working class and the upper class. They are likely to ...

Making the middle class is tougher in Delaware than most states — except one First State city with the nation’s highest percentage of middle-class residents. The middle class is a socioeconomic group ...

The United States Census Bureau does not have an official definition for the term "middle-class." But the Pew Research Center does. By Pew Research Center standards, the middle class is made up of ...

Abstract: The polarization state of an erbium-doped fiber laser was changed, and its dependence on the spectral width and mean power generated at the end of a high-nonlinear fiber was investigated.