Scale

Scale or scales may refer to:

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Khan Academy

Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan with the aim of providing a free, world-class education for anyone, anywhere. The organization produces short lectures in the form of YouTube videos. In addition to micro lectures, the organization's website features practice exercises and tools for educators. All resources are available for free to anyone around the world. The main language of the website is English, but the content is also available in other languages.

History

The founder of the organization, Salman Khan, was born in New Orleans, Louisiana, United States to immigrant parents from Bangladesh and India. After earning three degrees from the Massachusetts Institute of Technology (a BS in mathematics, a BS in electrical engineering and computer science, and an MEng in electrical engineering and computer science), he pursued an MBA from Harvard Business School.

In late 2004, Khan began tutoring his cousin Nadia who needed help with math using Yahoo!'s Doodle notepad.When other relatives and friends sought similar help, he decided that it would be more practical to distribute the tutorials on YouTube. The videos' popularity and the testimonials of appreciative students prompted Khan to quit his job in finance as a hedge fund analyst at Connective Capital Management in 2009, and focus on the tutorials (then released under the moniker "Khan Academy") full-time.

Seventh grade

Seventh grade (called Grade 7 in some regions, and Year 7 in some other regions such as Australia) is a year of education in many nations. The seventh grade is the seventh school year after kindergarten. Students are usually 12-13 years old. Traditionally, seventh grade was the next-to-last year of grade school. In the United States and Canada, it is usually the second, third, or last year of middle school, the first year of junior high school, or the 7th year of grade school. In Quebec, it is usually the last year of elementary school or the first year of high school.

In the United States, in mathematics, students focus commonly on an introduction to pre-algebra or the beginnings of algebra including ratio, proportion, and percent. New topics sometimes include scientific notation, concepts with negative numbers, and more advanced geometry. In some parts of the United States, such as Texas, Colorado, California and Utah, math may be mixed-grade according to the student's previous knowledge, so some students may already be in a 9th grade algebra course. In social studies, advanced pre-Civil War History is taught. Though American history is usually the norm, other cultures and time periods may be taught. In science, it is usually moderate-level biology. In some parts of the United States, seventh grade is the first school year in which students have different teachers for each of their subjects, and so they change classrooms at the end of each period. Foreign language is often introduced at this level. The students can typically choose from several languages depending on school ability.