# Reference

- 1
- Abacus: Mystery of the Bead
- Page http://abacus.etherwork.net/
- History of the abacus and an instruction manual on its use.

- 2
- Equations
- Page http://www.equationsheet.com/
- Searchable directory, arranged by field, of equations, constants, symbols and SI units. Also features LaTEX utilities, software links.

- 3
- Geometry Formulas and Facts
- Page http://geom.math.uiuc.edu/docs/reference/CRC-formulas/
- An excerpt from the 30th Edition of the CRC Standard Mathematical Tables and Formulas, covering the area of Geometry (minus differential geometry), by Silvio Levy.

- 4
- Journal of the AMS
- Page http://www.ams.org/publications/journals/journalsframework/jams
- Online collection of articles and research papers posted on Journal of American Mathematical Society.

- 5
- K-12 math textbook content analysis
- Page http://www.k-12math.info/
- Spreadsheets on the distribution of 1000 common math terms as used in K-12th grade mathematics textbooks over the last 30 years. Analysis in English, Spanish and French.

- 7
- Math Tube
- Page http://www.mathtube.org/
- Mathematics lecture videos and talks taken from The Pacific Institute for the Mathematical Sciences (PIMS) member universities and around the world.

- 8
- Math formulas
- Page http://www.sciencehq.com/math-formulas/
- A large , free online lists of mathematics formulas. Collection of all basic and advanced formulas related to mathematics.

- 9
- Mathematics Resources
- Page http://www.educationindex.com/math/
- Offers a large number of links to mathematical resources, dedicated to various topics.

- 10
- NIST Digital Library of Mathematical Functions
- Page http://dlmf.nist.gov/
- Result of a project to provide a modern revision of Abramowitz and Stegun’s "Handbook of Mathematical Functions". The site includes definitions, properties, and graphs of many special functions.

- 11
- Numerical Prefixes
- Page http://phrontistery.info/numbers.html
- Tables for Greek and Latin number values alone and as a part of other words.

- 12
- PlanetMath
- Page http://planetmath.org/
- A collaborative encyclopaedia with entries contributed under the GNU Free Documentation License.

- 13
- Platonic Realms
- Page http://www.mathacademy.com/pr/index.asp
- Online resource for the mathematics community: links library, bookstore, quotes, and online articles.

- 14
- Summation Formulae
- Page http://polysum.tripod.com/
- For polynomials of degrees up to 50, generated using the Euler-Maclaurin method.

- 15
- The Math Reference Project
- Page http://www.mathreference.com/
- An electronic archive of articles by Karl Dahlke on topics ranging from high school geometry up to graduate level topology.

- 16
- Welcome to the Tricki
- Page http://www.tricki.org/
- A large collection of useful mathematical problem-solving techniques.

- 17
- Wikipedia: Mathematics Section
- Page http://en.wikipedia.org/wiki/Mathematics
- Free encyclopedia. Covers number systems, different math fields, foundations, history, applications, and famous problems.

- 18
- Wolfram: Mathematical Functions
- Page http://functions.wolfram.com/
- Includes advanced formulas and visualizations of various equation, such as elliptical curves.