University of St. Andrews (UK)
University of St. Andrews: Takakazu Seki Kowa
The University of St. Andrews offers this biography of Takakazu Seki Kowa. Many interesting links are provided.
Other
Wichita State University: Takakazu Seki Kowa (1642 1708)
This site provides a general biography of Takakazu Seki Kowa, "the arithmetical sage." Content focuses on his known accomplishments. Also includes related links.
ClassFlow
Class Flow: Magic Math Squares
[Free Registration/Login Required] Students complete number sentences by inserting numbers in the correct order to arrive at a predetermined answer.
Alabama Learning Exchange
Alex: Imaginary Numbers? What Do You Mean Imaginary?
Is it any wonder that young scholars are suspicious? We lead, sometimes drag, them through Algebra I insisting they must follow the order of operations. We make them learn the "hard way" of doing an assignment one day only to show them...