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A variety of free tools to help students with Algebra, geometry, trigonometry, calculus, and statistics.

This is a series of videos about doodling in math class. They relate, although sometimes loosely, to topics from geometry, algebra, trigonometry, and precalculus. Very fun to show students as a side-note to regular lessons.

En touchtrigonometry.org podemos mover el ratón para sincronizar el ángulo de la circunferencia izquierda con el valor de las diferentes funciones, cuyos gráficos aparecen a la derecha. Entender la relación existente entre los ángulos y las funciones, así como para ver los valores en grados y radianes de forma sencilla e intuitiva. Una herramienta simple, sin nada de flash en su contenido,

A fantastic maths games website which has games designed to practise particular skills in maths. There's blasting robots games and picking flowers games. Signing up is not necessary to play most games. A must try site. http://ictmagic.wikispaces.com/Maths

interactive trig values on the unit circle!  move around the radius to get angle measures and trig values