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# Math

**Annenberg Learner: Mathematics**

https://www.learner.org/subject/mathematics/

This web site has lessons in math organized by grade level.

BBC Skillswise Math

http://www.bbc.co.uk/skillswise/maths

Useful math skills for adults. Learn about decimal points, rounding off numbers, ratios and proportions, multiplication, division, negative numbers, and addition and subtraction. Offers tables to help with multiplication, information about graphs, and how to calculate area, perimeter, and volume.

**Converting Metric Measurements**

https://www.nist.gov/pml/weights-and-measures/approximate-conversions-metric-us-customary-measures

Provides mathematical formulas for converting common metric measurements to U.S. measurements ( for area, temperature, length, mass, volume).

**edX Math Courses**

https://www.edx.org/course/subject/math

Free online math courses from universities like MIT and Caltech.

**Khan Academy for Math**

https://www.khanacademy.org/

Free online math instruction, from Kindergarten to multivariable calculus and linear equations.

**MacTutor- History of Mathematics Archive**

http://www-groups.dcs.st-and.ac.uk/~history/index.html

Browse for mathematiciansâ€™ biographical information, descriptions of famous curves, and other historical topics. Notable for its Female Mathematicians, Birthplace Maps, Timelines, and Quotations Indexes.

**Martindale's Calculators On-Line Center**

http://www.martindalecenter.com/Calculators.html

Links to almost 9,000 calculators for cooking, finances, home repair, medicine, navigation, taxes, etc.

**Math2.org**

http://math2.org/

Diagrams and formulas explain concepts in general math, algebra, geometry, trigonometry, calculus, and advanced topics. Available in Spanish and English, with a link to an English-Spanish math dictionary (Other On-site Resources).

**Virtual Math Lab**

http://www.wtamu.edu/academic/anns/mps/math/mathlab/

Free tutorials prepared by West Texas A&M University. Subjects include: College Algebra, Intermediate Algebra, Beginning Algebra, or preparing for the math part of the THEA, ACCUPLACER or general GRE test.

**WebMath**

http://www.webmath.com/

Problem solving in everyday math, algebra, trigonometry, graphing, and word problems. Additional features include unit conversions and online quizzes that allow visitors to test themselves.

**Wolfram MathWorld**

http://www.mathworld.wolfram.com

Actively developed and maintained website providing encyclopedia-like articles for nearly 13,000 mathematical topics and concepts.

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