Links Alive: Math

• Cross Sums (www.pro.or.jp) rate
  Play cross sums online. A cross sum is like a mathematical crossword puzzle. You have to make the different parts of the puzzle add up to a given value.
• Interactive Mathematics Miscellany and Puzzles (www.cut-the-knot.org) rate
  Cut-The-Knot is a massive site by Alexander Bogomolny with essays puzzles and mathematics.
• Descriptive Mathematics (descmath.com) rate
  A site conerned with the liberal arts aspects of mathematics. It contains a discussion of rich theory, calculus and other topics.
• Online Math Education (www.math10.com) rate
  Site about education in mathematics where you can find many math formulas and ask the teacher.
• Mathematically Correct (mathematicallycorrect.com) rate
  A site concerned with the quality of Math Education.
• Homeschool Math (www.homeschoolmath.net) rate
  HomeschoolMath.net is a comprehensive math resource site for homeschooling parents and teachers
• Continued Fractions (www.mcs.surrey.ac.uk) rate
  This is an online work about continued fractions.
• Planet Math (planetmath.org) rate
  PlanetMath is a virtual community which aims to help make mathematical knowledge more accessible.
• Math is Fun (www.mathsisfun.com) rate
  Math is Fun has pages on interesting aspects of mathematics.
• mecmath (www.mecmath.net) rate
  Site has an open sourced book on Vector calculus.