GeoGebra is free educational mathematics software that links dynamic geometry, algebra and calculus.

Users can produce various constructions including...

• points;
• vectors;
• segments;
• lines; and
  
• conic sections...

...as well as functions, which can be altered dynamically by mouse afterwards.

Direct input, e.g. g: 3x + 4y = 7 or c: (x – 2) ² + (y – 3) ² = 25, is also possible, and a range of commands, including differentiation and integration, are available for use.

An i...

Mr. Robb's Math Videos is a YouTube channel containing 555 videos produced by mathematics teacher Bradley Robb.

Mr. Robb's videos explain and demonstrate solving problems in...

• Algebra I;
• Algebra II; and
  
• Calculus.
  

Adrian Banner, a lecturer at Princeton, has put together a lecture series (in video) that will help learners master calculus.

The 24 lectures were originally presented as review sessions for Princeton introductory calculus courses offered in 2006, and each runs about two hours.

Note: Adrian Banner has used these lectures to develop a book called The Calculus Lifesaver: All the Tools You Need to Excel at Calculus.

To access the videos go to http://press.princeton.edu/video/banner/.