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"Open Educational Resources OpenLearn's LabSpace makes many different open educational resources (OER) available to you from a wider OER community associated with The Open University. You are encouraged to take away, re-use and remix these open educational resources to suit your needs as an educator. Broadly speaking, LabSpace resources fall into the categories of 'content' or 'tools'. Content, depending on its origin and the intended audience can be published in the Resources section or in one of three places depending on who you are: IndieSpace, ProjectSpace and SectorSpace. "

Math Resources - Tutorials, Formulas, Calculators, Directories Directorio con un sin fin de  recursos matemáticos

Mathematics is the King of Arts and the Queen of all Sciences Página que propone problemas a resolver, en inglés.

Mathway es una aplicación web que permite resolver problemas matemáticos online. Herramienta gratuita que no requiere registro para poderla usar. Resuelve paso a paso problemas de diferentes bloques de contenidos, paso a paso, descubriendo la manera de llegar a la solución.

Fibonacci Numbers and the Golden Section This is the Home page for Dr Ron Knott's multimedia web site on the Fibonacci numbers, the Golden section and the Golden string hosted by the Mathematics Department of the University of Surrey, UK. The Fibonacci numbers are 0, 1, 1, 2, 3, 5, 8, 13, ... (add the last two to get the next) The golden section numbers are ±0·61803 39887... and ±1·61803 39887... The golden string is 1 0 1 1 0 1 0 1 1 0 1 1 0 1 0 1 1 0 1 ... a sequence of 0s and 1s that is closely related to the Fibonacci numbers and the golden section. There is a large amount of information here on the Fibonacci Numbers and related series and the on the Golden section, so if all you want is a quick introduction then the first link takes you to an introductory page on the Fibonacci numbers and where they appear in Nature. The rest of this page is a brief introduction to all the web pages at this site on Fibonacci Numbers the Golden Section and the Golden String together with their many applications.