Mathematical education material

• Geometry.

• The asymmetric propeller.
• A geometric inequality question.
• A problem on maxmimal angle.
• Traingles with common base.
• Common tangents.
• The Euler Line of a Triangle.
• Butterfly Theorem.
• The problem concerning triangles with integer sides Article 1 , Article 2.
• The smallest rectangle containing a finite set of points, and a related article.
• Other problems.

• Elegant Geometric Constructions by Paul Yiu.
• Encyclopedia of Triangle Centers by Clark Kimberling.

• Direct instructions really works!
• Good intentions are not enough - by Richard Askey
• Teach math, not estemm - by J. Zimmerman
• The goals of mathematical education - by G. Polya

• The MacTutor History of Mathematics archive
• Some topics in the history of mathematical education

• Biblioteka "Matematicheskoe prosveshjenie": Booklets based on lectures for school students. See, for example, Prasolov's handout on isogonal conjugation.
• Geometricheskie zadachi: A collection of geometrical problems with solutions (including some advanced results of Triangle Geometry). Certain dynamic Java applets.
• Populjarnye lekzii po matematike: Downloadable scans of a really famous series of booklets.

• Geometry problems.
• The Mathematics Manipulatives
• The Math Forum
• The mathematics genealogy project
• Mathematical quotations
  
• Mathematical jokes
• Jokes for mathematics teachers