MATHDI database
MATHDI (MATHematical DIdactics) is the most comprehensive and up-to-date computerised information service in the fields of mathematics education and computer science education elementary mathematics and its applications as well as psychological and pedagogical issues for mathematics and science education.
Visit MathWorld™
Wolfram Research is “pleased to announce a major enhancement to an established internet reference. Eric Weisstein’s World of Mathematics also known as MathWorld is now not only the web’s most extensive mathematics resource (containing over 10 000 individual entries) but also one of the easiest to navigate.