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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.

Calculator.net

https://www.calculator.net/

Links to almost 9,000 calculators for finances, fitness, scientific, GPA, and more

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. En Español

MacTutor- History of Mathematics Archive

https://mathshistory.st-andrews.ac.uk/

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

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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