 A+ Math
A site developed to help elementary school students improve their math skills interactively, offering: educational math games (learn basic operations and geometry by playing MATHO  bingo and math combined; Hidden Picture; and Concentration), Web flash cards for practicing rounding, area, square roots, inequalities, fractions, counting money, geometric shapes; and Homework Helper, which lets you enter your addition, subtraction, multiplication or division problem and your answer, then checks to see if it's correct. Also Advanced Problems which allows you to select the kind of problem you want to practice and checks your answers.
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 K12 Teaching Materials (Mathematics Archives)  University of Tennessee, Knoxville (UTK)
An extensive list of Internet sites with significant collections of materials that can be used in the teaching of mathematics at the K12 level. Organized into categories: lesson plans, schools, software and other K12 Internet math sites.
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 Math for Morons Like Us  ThinkQuest 1998
Students talk to students about math: a site designed to help you understand math concepts better. Tutorials, sample problems, and quizzes for PreAlgebra, Algebra, Geometry, Algebra II, and PreCalc/Calculus, designed assuming you know some of the basic concepts but need reinforcement, or want to review things you learned in the past. Interactive resources include a message board, calculus board, formula database, quizzes, math links, and a place to send feedback.
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 Monthly Themes  NRICH Maths, Univ. of Cambridge
Past problems from the NRICH Online Maths Club, archived by month. Each problem has a symbol indicating the stage, which tells you how little or how much mathematics you need to know to solve the problem but is no indication of its difficulty. The five stages correspond to ages 57, 711, 1114, 1416 and 1618, and indicate that students in the UK normally meet the maths required during that key stage.
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 Problem Solving in Mathematics  Jim Wilson; Univ. of Georgia
Problems in algebra, geometry, conversion, cryptarithm, "mean," trigonometry, and a mixture of all, many with comments and solutions, from a course given in the Dept. of Mathematics Education at the University of Georgia. The site also provides links to papers, including "Mathematical Problem Solving" (Wilson, Fernandez, & Hathaway), a synthesis of research on problem solving [published as ch. 4 in Wilson, P. S. (Ed.) (1993), Research Ideas for the Classroom: High School Mathematics, New York: MacMillan].
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 Trigonometry (S.O.S. Mathematics)  Dept. of Mathematical Sciences, Univ. of Texas at El Paso
An online course: learning units presented in worksheet format review the most important results, techniques and formulas in college and precollege trigonometry. Trigonometry: Angle Measures, Trigonometric Functions (magic identity, Addition Formulas, DoubleAngle and HalfAngle Formulas, Product and Sum Formulas), Trigonometric Equations, Table of Trigonometric Identities. Hyperbolic Trigonometry: Hyperbolic Functions, Inverse Hyperbolic Functions.
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 WIMS (WWW Interactive Mathematics Server)  Université de Nice  Sophia Antipolis
Interactive mathematical applications, also available in French, with documentation. The server's exercises and programs are designed to find a polynomial with given values; find the Taylor expansion of a function; find a polynomial from its curve; given function and epsilon, find delta (on the definition of continuity); and find the root of a function by successive tests. Mathematical tools will: expand a real number into a continued fraction; factor integers, rational numbers, polynomials, and rational fractions; calculate onevariable functions (Integrals, limits, roots...); calculate determinant, inverse, eigenvectors... matrices; and solve linear systems, including systems with parameters. Also a visual exercise on the definition of maps (Javascript), exercises on minima/maxima, and a mathematical puzzle based on finite fields. These materials could be useful in a U.S. precalculus course.
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