Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Vectores en El Plano
In Spanish. Interactive activities to introduce the concept of a vector and its different operations.
Other
Netcomuk: Working With Vectors
Contains an index of pages that discuss how to work with vector fields. Includes information on basic vector operations, multiplying vectors, lines and planes, and extra bits of information.
National Council of Teachers of Mathematics
The Math Forum: Dot Products of Non Unit Vectors
Description of finding the formula for the dot product of any two vectors.