Education

¡Say hello a tu nueva forma de aprender inglés! 👌"Boring classes? No thanks!" Aprender inglés por tu cuenta, estando motivado, ya es posible. Let's begin!

Race against live opponents typing quotes from books, movies, and songs.

Escriba mucho más rápido sin mirar su teclado. Este curso gratuito le ayudará a aumentar su velocidad y precisión.

With our free mobile app or web and a few minutes a day, everyone can Duolingo. Learn 30+ languages online with bite-size lessons based on science.

Vea qué partidos políticos, candidatos e iniciativas electorales Español coinciden con sus creencias según los temas de 2021 que son más importantes para usted.

Cambios de moneda mundiales e historia de las tasas de cambio de moneda

Web especializada en física, con contenido de utilidad para todos los interesados de toos los niveles: bachilleres, estudiantes de carrera, licenciados, doctorandos, etc.

Encuentra a tu profesor de clases particulares o en grupo entre más de 60 000 perfiles: a domicilio, en casa del profesor, en un aula o, incluso, por webcam. Más de 40 000 alumnos ya han confiado en nosotros.

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The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands). Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.” There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.

fxSolver is a math solver for engineering and scientific equations. To get started, add some formulas, fill in any input variables and press "Solve."

English Dictionary and Translation Search with 1,000,000,000 example sentences from human translators. Languages: English, German, French, Spanish, and Portuguese

Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.

Drag and drop countries around the map to compare their relative size. Is Greenland really as big as all of Africa? You may be surprised at what you find! A great tool for educators.

Estupendo graficador 3D online con el cual podrás generar increibles gráficas 3D de funciones de dos variables, superficies parametricas, vectores, etc.

Online Graph draw: plot function, plot parametric curves,plot polar curves.

Wolfram|Alpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

Online graph sketching app that can graph functions and numerically solve differential equations. Requires Javascript HTML 5.

Integrales Irracionales. Función Beta. Función Chi-cuadrado. Función Gamma. Portal Estadística Aplicada. Consultoría Estadística-Econometría. Máster Econometria. Nobel Economía