Juego para calcular ángulos. Tres niveles de dificultad en función de la precisión pra estimar el ángulo, los valores máximos y mínimos (menores de 90, menores de 180 y hasta 360º)
Math Pickle is a nice site for locating videos and exercises appropriate for teaching a variety of mathematics concepts at a variety of grade levels. When you visit Math Pickle you can browse for videos by grade level. Once you've selected a grade level you can then refine your browsing to a particular concept. Each concept has a demonstration video and links to Keynote and Powerpoint files for teachers. Each concept also has links to PDF worksheets that you can download and print.
Pistas para escribir símbolos matemáticos y ecuaciones en una gran variedad de aplicaciones: Open Office, como caracter ASCII, Google Docs, Microsoft, etc.
3DTin is a free web-based program for creating three dimensional models. 3DTin provides templates that you can use to develop models or you can build a model completely from scratch. The service is completely free to use as long as you allow your models to be labeled with a Creative Commons license and put in the 3DTin gallery. The gallery is a great place is to find examples of what can be created in 3DTin. Models that you create can be exported for use in other modeling software.