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Lesson Plans
  1. -Addition, Subtraction, Multiplication, and Division (Awesome Library)
      Provides hundreds of lesson plans, worksheets, examples, and articles. 7-01
  2. -Algebra (Awesome Library)
      Provides lessons and introductory materials. 6-00
  3. -By Elementary School Level (Awesome Library) star
      Elementary School Math provides related projects, lesson plans, and additional resources.
  4. -By High School Level and Middle School Level (Awesome Library) star
      Provides related projects, lesson plans, and papers to supplement the lesson plans.
  5. -By Topic (Math Forum) star
      Provides math lessons within 32 topics. Search for materials by grade level, topic, and type of material.
  6. -By Topic (Thinkquest Team 20991) star
      Provides math tutorials by topic. 5-00
  7. -Calculus and Pre-Calculus (Awesome Library)
      Provides lessons and introductory materials. 6-00
  8. -Decimals (Awesome Library)
      Provides lessons, worksheets, examples, and more.
  9. -Fractions (Awesome Library)
      Provides lessons, worksheets, examples, and more.
  10. -Geometry (Awesome Library)
      Provides lessons and introductory materials. 6-00
  11. -Measurement (Awesome Library)
      Provides many lessons, standards, worksheets, examples, and more.
  12. -Probability and Statistics (Awesome Library)
      Provides lessons and introductory materials. 6-00
  13. -Trigonometry (Awesome Library)
      Provides lessons, worksheets, introductory materials, and more. 6-00
  14. Addition - Without Carrying (AskERIC - Evans)
      Provides a lesson that makes addition much easier for some students. 5-00.
  15. Addition and Multiplication - Estimating Trip Costs (CurriculumUnits.com - Marquis, Marquis, Mello, and Young)
      Excellent Adventure provides worksheets and a lesson plan for students to estimate the cost of a trip between two cities by automobile. 12-00
  16. Addition and Subtraction (Houghton Mifflin Company)
      Provides a lesson plan to teach the basics of addition and subtraction. 5-00.
  17. Addition and Subtraction (ProTeacher)
      Provides 10 sources of lessons. Many include worksheets. 12-99
  18. Algebra (Weisstein and Wolfram Research)
      Provides a comprehensive set of advanced resources in algebra, including quadratic forms, field theory, equations, identities, invariants, operations, cyclotomy, coding theory, polynomials, and much more. 12-99
  19. Algebra (bigchalk.com)
      Provides dozens of lessons by general grade level. 5-00
  20. Algebra - Graphing Relations and Functions (Moore)
      Introduces basic concepts through problems to solve. 5-00.
  21. Algebra - Introduction (Math League Multimedia)
      Provides the basics of Algebra, forming a foundation for solving equations.11-99
  22. Algebra Basics (Thinkquest Team 20991)
      Provides basic algebra tutorials by topic, incuding square roots, scientific notations, graphing, ratios, fractions, factoring, single and multi-variable equations, exponents, and word problems. 5-00
  23. Algebra Basics - Problems and Solutions (Discovery.com - WebMath)
      Provides solutions and answers to basic problems in algebra and pre-algebra, including Sequences, Basic Factoring, Permutations, Simplifying Expressions, Polynomials, Factoring Expressions, Solving Linear Equations, Solving Advanced Equations, Graphing Functions, Solving Systems of Equations, Quadratic Equations, Radical Expressions, Complex Numbers, Conic Sections, Inequalities, and Writing Linear Equations. Visitors sometimes misspell as prealgebra or pre algebra. 6-01
  24. Algebra By Topic (Math.com)
      Provides algebra lessons and quizzes. Examples of topics include definitions, operations, equations, exponents, expressions, properties, and graphing. 5-00
  25. Algebra II (Thinkquest Team 20991)
      Provides algebra tutorials by topic, incuding equations and inequalities, graphs or graphing and functions, polynomials and factoring, fractional expressions, powers and roots, complex numbers, quadratic equations and functions, coordinate geometry, exponential and logarithmic functions, probability, and matrices. 5-00
  26. Algebra Lessons (AskERIC)
      Provides lessons by topic and grade level. 2-01
  27. Algebra Lessons (PBS TeacherSource)
      Provides two dozen lessons, by topic. 3-01
  28. Algebra and Arithmetic (Selby)
      Provides problems in Arithmetic, Logic, and Algebra. 9-01
  29. Applied Math (bigchalk.com)
      Provides over two dozen lessons at the elementary level. 5-00
  30. Basic Math (Teaching Ideas)
      Provides fun ways for children ages 5 - 11 to learn math basics, such as addition, subtraction, multiplication, and division. 5-00.
  31. By Grade Level (Learning Network - TeacherVision.com)
      Provides dozens of math lesson plans by grade level. 5-01
  32. By Grade Level (Math Forum)
      Provides over 400 annotated math problems and resources. Many are organized by grade level.
  33. By Grade Level (PBS - Mathline)
      Provides over a dozen math lessons for each group of grades. Funded by the U.S. Department of Education. 3-02
  34. By Grade Level - Elementary School Level (Columbia Education Center)
      Delzeit provides 32 mini-lessons for grades K-5 from the Columbia Education Center.
  35. By Grade Level - Elementary School Level (Math Forum)
      Provides over 450 math lessons from many sources.
  36. By Grade Level - High School Level (Columbia Education Center)
      Delzeit provides 8 mini-lessons for grades 9-12 from the Columbia Education Center.
  37. By Grade Level - High School Level (Math Forum)
      Provides over 450 math lessons from many sources. Duplicates many of the Middle School Level resources.
  38. By Grade Level - Middle School Level (Columbia Education Center)
      Delzeit provides 13 mini-lessons for grades 6-8 from the Columbia Education Center.
  39. By Grade Level - Middle School Level (Math Forum)
      Provides over 450 math lessons from many sources. Duplicates many of the Elementary School Level resources.
  40. By Grade Level and Subject - California Math for K-12 (Kings County Office of Education - Shaver)
      Provides a directory of lessons organized by the California Math Framework for K-12. California's framework for curriculum standards is similar to the national standards for math, as well as standards in many states.
  41. By Grade Level and Topic (8-10) (British Columbia Ministry of Education)
      Provides math outcomes and activities by topic and grade level (8-10). 5-00
  42. By Grade Level and Topic (K-7) (British Columbia Ministry of Education)
      Provides math outcomes and activities by topic and grade level (K-7). 5-00
  43. By Grade Level and Topic (bigchalk.com)
      Provides lessons in arithmetic, fractions, decimals, percentages, measurement, probability and statistics, numbers, and graphing. 3-02
  44. By Grade Level or Topic (AAA Math - Banfill)
      Provides lessons on addition, subtraction, multiplication, division, and more. Organized by grade level or topic. 8-00
  45. By Grade Level or Topic (Sasson)
  46. By Grade Level or Topic (Sasson)
      Links to the North Carolina Department of Public Instruction comprehensive lesson plans for grades 1, 2, and 4, organized to meet math standards. Site also has math lesson plans from Big Sky, ERIC, and Explorer.
  47. By Grade Level or Topic Standards (North Carolina DPI)
      Provides math lessons and activities by grade level or topic to support meeting math standards. 2-00
  48. By Subject and Standard - Math (Shodor Foundation)
      Provides interactive problems, with graphics, by topic and standard. 12-00
  49. By Topic (Banfill)
      Provides lessons on addition, subtraction, multiplication, division, and more. Organized by topic. 5-00
  50. By Topic (Discovery.com - WebMath)
      Provides a directory to math lessons by topic. 4-00
  51. By Topic (ERIC - AskERIC)
      Provides dozens of math lessons by topic. Includes grade level.
  52. By Topic (ProTeacher)
      Provides carefully selected sources of lessons in fractions and decimals, geometry and measurement, patterns and relationships, and whole number operations. 12-99
  53. By Topic - Arithmetic (Teachers Helping Teachers)
      Provides their 8 top recommended lessons.
  54. Calculating With an Abacus (Fernandes)
      Shows how to add and subtract on the ancient oriental abacus. Compares abacus speed with calculator.
  55. Calculus (Weisstein and Wolfram Research)
      Provides a comprehensive set of advanced resources in calculus. 12-99
  56. Calculus - Falling Bodies and Projectile Motion (HighWired.com)
      Provides a foundation to understand "the motion of falling bodies in one and two dimensions and calculate their speed and motion using the distance and velocity formulas." 3-01
  57. Calculus Basics - Problems and Solutions (Discovery.com - WebMath)
      Provides solutions and answers to basic problems in calculus, including Derivatives and Integration (anti-derivative). 6-01
  58. Calculus Basics - Problems and Worksheets (The Mathman - Cohen)
      Provides problems and instructions designed for younger students, but helpful to all students to gain the basics of calculus. 12-01
  59. Calculus Lessons (British Columbia Ministry of Education)
      Provides calculus lessons by topic. Follow the arrows at the bottom of pages to go to specific lessons. 2-01
  60. Calculus Problems (Mathman)
      Provides 14 sample problems.
  61. Census and Population (Boone)
      Provides a lesson using census data and projecting population information. 4-00
  62. Cookie Sharing Problems (Cohen)
      Provides 4 math problems on sharing cookies with several people.
  63. Current Events - California's Power Problems (CNN)
      Provides a lesson to help students see how energy is used in the home and relate that information to larger issues. 7-01
  64. Current Events - Math Problems Related to Current Events (New York Times)
      Provides dozens of lessons plans. Many of the lessons have relevance for current events. 12-01
  65. Data Analysis - Scatter Plots and Correlation (Moore)
      Provides an introduction to the concepts using parts of their own bodies for examples. 5-00.
  66. Data Analysis Basics - Problems and Solutions (Discovery.com - WebMath)
      Provides solutions and answers to basic problems in data analysis, including Average, Standard Deviation, and Histograms. 6-01
  67. Data Analysis Lessons (Mathematics Education Partnership Program)
      Provides over a dozen lessons in PDF format. Elementary level. 5-00
  68. Data Analysis Lessons (PBS TeacherSource)
      Provides eight lessons, by topic. 3-01
  69. Eighth Grade Math Lessons, Instructions, and Activities (MathForum.org)
      Provides 57 sources of lessons, instructions, and activities related to eighth grade math. 2-02
  70. Elementary Math Lessons by Topic (Teachers.net)
      Provides resources by topic. 3-00
  71. Fitness Related Math Lessons (PE Central)
      Provides almost two dozen lessons. Go to "Search by a Specific Sub-Category and select Math. 10-01
  72. Fractals
  73. Fractions - Reducing and Converting (Discovery.com - WebMath) star
      Provides problems and explains solutions. Requires Java for some problems. 5-00.
  74. Fractions and Decimals (bigchalk.com)
      Provides lessons in fractions and decimals. 3-02
  75. Fractions, Decimals, Ratios, and Percentages (bigchalk.com)
      Provides over two dozen lessons. 5-00
  76. Games to Learn Math Fundamentals (Conway)
      Provides 16 games.
  77. Geometry (MSTE)
      Provides lessons in geometry and probability. 2-00
  78. Geometry (Weisstein and Wolfram Research)
      Provides a comprehensive set of advanced resources in geometry, including differential, non-euclidean, plane, line, coordinate, inversive, and much more. 12-99
  79. Geometry - Measuring a Tree's Height (Vratil)
      Provides a lesson for a group to measure the height of a tree using geometry. 8-00
  80. Geometry - Polygon, Elementary Level (Houghton Mifflin Company)
      Provides an introduction to geometry through a lesson about the polygon. 5-00.
  81. Geometry - The Triangle (Teacher Created Materials)
      Introduces students to the triangle and basic geometry. Includes worksheets in PDF format. Grades 5 - 8. 5-00
  82. Geometry Basics (Thinkquest Team 20991)
      Provides basic geometry tutorials by topic, incuding parallel lines, triangles (congruent, right, isosceles, and equilateral), quadrilaterals, parallelograms, ratios, polygons, circles, squares, rhombuses, trapezoids, volumes, areas, pyramids, cylinders, cones, spheres, prisms, arcs, angles, chords, radius or radii, Pythagorean theorem, intersections, slopes, tangents, secants, circumferences, coordinate geometry, and more. 5-00
  83. Geometry By Topic (Math.com)
      Provides geometry lessons and quizzes. Examples of topics include definitions, polygons, quadilaterals, Pythagorean theorem, prisms, pyramids, circles, spheres, cylinders, triangles, squares, and square roots. 5-00
  84. Geometry Lesson Plans - Elementary School Level (BigChalk.com)
      Provides dozens of geometry lessons and articles. Includes points, lines, angles, graphing, circles, spheres, shapes, transformation geometry, triangles, polygons, quadrilaterals, areas, and volumes. 5-01
  85. Geometry Lesson Plans - High School Level (BigChalk.com)
      Provides dozens of geometry lessons and articles. Includes points, lines, angles, graphing, circles, spheres, shapes, transformation geometry, triangles, polygons, quadrilaterals, areas, and volumes. 5-01
  86. Geometry Lesson Plans - Middle School Level (BigChalk.com)
      Provides dozens of geometry lessons and articles. Includes points, lines, angles, graphing, circles, spheres, shapes, transformation geometry, triangles, polygons, quadrilaterals, areas, and volumes. 5-01
  87. Geometry Lessons (Mathematics Education Partnership Program)
      Provides over a dozen lessons in PDF format. Elementary level. 5-00
  88. Geometry Lessons (PBS TeacherSource)
      Provides eight lessons, by topic. 3-01
  89. Geometry and Measurement (ProTeacher)
      Provides 10 sources of lessons. Many include worksheets. 12-99
  90. Grade -K - 3 Math and Manipulatives (Alternative Parenting)
      Provides 7 lessons for children kindergarten to third grade. 4-00
  91. Grade -K - 5 Various Lessons (CEC)
      Provides two dozen lessons.
  92. Grade 00K Math Curriculum Standards (North Carolina Public Schools) 2-00
  93. Grade 01 Math Curriculum Standards (North Carolina Public Schools) 2-00
  94. Grade 02 Math Curriculum Standards (North Carolina Public Schools) 2-00
  95. Grade 03 Math Curriculum Standards (North Carolina Public Schools) 2-00
  96. Grade 04 Math Curriculum Standards (North Carolina Public Schools) 2-00
  97. Grade 05 Math Curriculum Standards (North Carolina Public Schools) 2-00
  98. Grade 06 Math Curriculum Standards (North Carolina Public Schools) 2-00
  99. Grade 06 Math Lessons (Migrant.org - The Education Source)
      Provides resources by topic. Includes decimals, number theory, fractions and decimals, addition and subtraction of fractions, multiplying and dividing fractions, ratio, percent, probability, geometric figures, measurement, area, perimeter, statistics, and algebraic concepts.11-00
  100. Grade 07 Math Curriculum Standards (North Carolina Public Schools) 2-00
  101. Grade 07 Math Lessons (Migrant.org - The Education Source)
      Provides resources by topic. Includes integers, decimals, percent, algebraic concepts, probability, statistics, geometry, and patterns. 11-00
  102. Grade 08 Math Curriculum Standards (North Carolina Public Schools) 2-00
  103. Grade 08 Math Lessons (Migrant.org - The Education Source)
      Provides resources by topic. Includes rational numbers, real numbers, proportions, consumer mathematics, statistics, geometry, probability, and algebra. 11-00
  104. Grade 6 - 8 Various Lessons (CEC)
      Provides 18 lessons.
  105. Grade 7 - 12 Various Lessons (CEC)
      Provides 9 lessons.
  106. Graphing - Elementary Level (bigchalk.com)
      Provides lessons in graphing. 3-02
  107. Graphing - High School Level (bigchalk.com)
      Provides lessons in graphing. 3-02
  108. Graphing - Middle School Level (bigchalk.com)
      Provides lessons in graphing. 3-02
  109. Graphing Calculators Tutorials (Texas Instruments)
      Provides lessons for using different Texas Instruments (TI) graphing calculators. To find the lesson, first select the product from the menu. 10-01
  110. Grocery Store and Home Problems (US Dept of Education)
      Provides 21 math lessons for the parent to use with children ages 5 - 13 in the home and at the grocery store.
  111. Internet and Math (Susan Boone)
      Provides 7 lessons utilizing the Internet.
  112. Jazz and Math Lesson (PBS - Ken Burns Jazz)
      Provides a complete lesson plan relating jazz, tempo, and math. 2-01
  113. Lesson Plans - Elementary Level (Louisiana Public Schools)
      Provides lesson plans by teachers and includes the subject areas covered for each. Lessons are arranged alphabetically, by title. 1-00
  114. Maps and Graphs Lessons (TeachNet)
      Provides two lessons.
  115. Math (Michigan State University and Ameritech)
      Provides dozens of lessons in math.
  116. Math Lesson Plans (Teachers.Net)
      Provides almost 200 individual lessons. Specifies a general grade level for each, such as elementary. The quality of lessons varies widely and some only announce the availability of lessons on a topic. 5-00
  117. Math Lessons (Scholastic)
      Provides lessons by topic and includes dozens of topics. 12-99
  118. Math Lessons (bigchalk.com)
      Provides over 150 lessons by general grade level. 5-00
  119. Math Lessons - Geometry, Number Theory, and More (Mrs. Glosser's Math Goodies)
      Provides online interactive math problems in geometry, number theory, and more.
  120. Math Lessons - Grades K - 12 (Explorer)
      Provides over 150 lessons.
  121. Math Lessons Search (Swathmore - Steve)
      Provides access to hundreds of math lessons.
  122. Math Resources - Advanced (Weisstein and Wolfram Research)
      Provides a comprehensive set of advanced resources in math. 12-99
  123. Math Skills Development (Teachers Helping Teachers - Mandel)
      Provides dozens of lessons plans that improve basic math skills, such as estimating. 12-01
  124. Math Worksheets, Games, Flashcards, and Lessons (APlusMath.com)
      Provides math worksheets, games, flashcards, and lessons with practice. 10-01
  125. Mathematics Lessons (Lanius)
      Provides over a dozen math lessons. Be sure to see the Teacher's Notes on each.
  126. Measurement (bigchalk.com)
      Provides over two dozen lessons. 5-00
  127. Measurement - Converting Between Metric and English Systems (Discovery.com - WebMath)
      Provides information to convert lengths, masses, speeds, volumes, temperatures, areas, volumes, or electrical power between two metric and English units of measurement. Converts numbers for you, then provides the formula. 6-01
  128. Measurement Lessons (PBS TeacherSource)
      Provides three lessons, by topic. 3-01
  129. Measurement and Conversion (bigchalk.com)
      Provides lessons in measurement. 3-02
  130. Measurement and Time (Houghton Mifflin Company)
      Provides a lesson plan to teach the basics of measurement through exploring the concept of time. 5-00.
  131. Measuring Astronomical Distances (HighWired.com)
      Provides "some of the more common techniques for measuring the distance of stars and galaxies and how and why astronomers developed them." 3-01
  132. Money Lessons (TeachNet)
      Provides a single lesson.
  133. Mt. Everest Math (Touchstone Energy - EverestQuest.com)
      Provides thematic math lessons related to climbing Mount Everest. Also has other lessons related to the same theme. 12-01
  134. Multiplication and Division (ProTeacher)
      Provides over a dozen sources of lessons. Many include worksheets. 12-99
  135. Music in Math - The Sound of Fractions (HighWired.com)
      Compares "math and music to see how mathematical concepts of ratio, proportion, common denominator, frequency, and amplitude connect with musical elements such as time signature, pitch, tone, and rhythm." 3-01
  136. Negative Numbers, Elementary Level (Houghton Mifflin Company)
      Provides an introduction to negative numbers. 5-00.
  137. Number Patterns (Teaching Ideas)
      Provides fun ways for children ages 5 - 11 to explore number patterns by solving 9 types of problems, including Pascal's triangle and Kapreakar's sequence. 5-00.
  138. Numbers Practice (Discovery.com - WebMath)
      Provides problems and answers for addition, division, finding factors for integers, finding the greatest common factor (GCF), and pronouncing very large numbers. 5-00.
  139. Numbers and Operations Lessons (PBS TeacherSource)
      Provides six lessons, by topic. 3-01
  140. Patterns and Relationships (ProTeacher)
      Provides over two dozen sources of lessons. Many include worksheets. 12-99
  141. Photography and Math (Kodak)
      Provides 5 lessons.
  142. Pi Lesson in Geometry (TeachNet)
      Provides a single lesson.
  143. Place Value to 1,000 (Houghton Mifflin Company)
      Provides a lesson plan to teach place value, which is vital for computation. 5-00.
  144. Place Values - Tens and Ones (Teacher Created Materials)
      Provides a lesson that uses craft sticks and beans to help children work with place values. Grades 1 - 3. 5-00
  145. Playgound Design (Architectural Education Resource Center - Elendil)
      Provides experience with math, as well as problem solving and drawing, to design and evaluate a playgound. 5-02
  146. Pre-Algebra (Awesome Library)
      Provides sources of pre-algebra lessons and quizzes. 4-02
  147. Pre-Algebra - Order of Operations, Elementary Level (Houghton Mifflin Company)
      Provides an introduction to order of operations, necessary for evaluating expressions. Visitors sometimes misspell as prealgebra or pre algebra. 5-00.
  148. Pre-Algebra By Topic (Math.com)
      Provides pre-algebra lessons and quizzes. Examples of topics include numbers, ratios, proportions, factoring, and fractions. Visitors sometimes misspell as prealgebra or pre algebra. 5-00
  149. Prime Factors (Teacher Created Materials)
      Provides a lesson that teaches about factors and the prime factor tree. Includes worksheets in PDF format. Grades 3 - 5. 5-00
  150. Prime Numbers (Teaching Ideas)
      Teaches how to find the prime numbers under 100. 5-00.
  151. Probability and Chance (Dartmouth College)
      Provides a directory of lessons, exercises, and resources to teach courses in Probability and Chance. Files are in PDF format. 5-00
  152. Probability and Statistics (Math Forum)
      Provides their 8 top recommended lessons.
  153. Probability and Statistics (Weisstein and Wolfram Research)
      Provides a comprehensive set of advanced resources in probability and statistics, including statistical distributions, time-series analysis, estimators, rank statistics, error analysis, and much more. 12-99
  154. Probability and Statistics (bigchalk.com)
      Provides lessons in probability and statistics. Includes standard deviation. 3-02
  155. Probability and Statistics Lessons (Mathematics Education Partnership Program)
      Provides seven lessons in PDF format. Elementary level. 5-00
  156. Probability and Statistics, Grades 8 - 10 (British Columbia Ministry of Education)
      Provides math outcomes, strategies, resources, activities, and assessment strategies for data analysis, chance, and uncertainty. 5-00
  157. Problem Solving Lessons (PBS TeacherSource)
      Provides seven lessons, by topic. 3-01
  158. Proportions, Elementary Level (Houghton Mifflin Company)
      Provides an introduction to proportions. 5-00.
  159. Quiz Maker for Math (Discovery.com - WebMath)
      Creates a math quiz that students can take online. Grades the quizzes and provides the correct answers. Teachers can have results of student work sent to them if they wish. 4-00
  160. Rational Numbers, Elementary Level (Houghton Mifflin Company)
      Provides an introduction to decimals and rational numbers. 5-00.
  161. Real World Lessons (TeachNet)
      Provides four lessons.
  162. Science and Math Lessons 1 (ALCOMed - SAM-Net)
      Provides a dozen lessons.
  163. Science and Math Lessons 2 (ALCOMed - SAM-Net)
      Provides a dozen lessons.
  164. Sciences- Basic Math for the Sciences (Dallas Community College District - Logan)
      Provides a clear introduction to basic math topics that are used in science. Includes scientific notation, the metric system, significant digits, logs and anti-logs, experimentation, graphing, algebraic formulation, algebraic method and more. 10-01
  165. Seventh Grade Math Lessons, Instructions, and Activities (MathForum.org)
      Provides 78 sources of lessons, instructions, and activities related to seventh grade math. 2-02
  166. Seventh Grade Math Lessons, Instructions, and Activities (MathForum.org)
      Provides 78 sources of lessons, instructions, and activities related to seventh grade math. 2-02
  167. Spanish Resources for Math 1 (Math Forum)
      Provides math resources and lesson plans in Spanish. 11-99
  168. Spanish Resources for Math 2 (Math Forum)
      Provides math resources and lesson plans in Spanish. 11-99
  169. Statistics - Designing an Experiment (Moore)
      Provides classroom level experiments to teach the basics of data analysis. 5-00.
  170. Statistics - Grade 9 - 12 (MSTE)
      Provides a series of exercises that fit within the NCTM Standards for statistics. 2-00
  171. Statistics - Interpreting Charts (Moore)
      Provides weather patterns and NBA ticket prices in graphic form to help students understand basic statistics. 5-00.
  172. Statistics - Introduction (Niles)
      Provides the basic terms and uses of statistics.11-99
  173. Statistics - Introduction (Niles)
      Provides the basic terms and uses of statistics.11-99
  174. Statistics and Probability Lessons (PBS TeacherSource)
      Provides six lessons, by topic. 3-01
  175. Trigonometry - Basic Course (Clark University - Joyce)
      Provides explanations, diagrams, problems, and answers for basic trigonometry concepts and problems. 4-00
  176. Trigonometry - Equations and Triangles (Thinkquest Team 20991)
      Provides examples of inverse trigonometry ratios, trigonometry equations, triangles, and laws of sines and cosines. Also includes a quiz. 5-00
  177. Trigonometry - Solving a Right Triangle (Discovery.com - WebMath)
      Provides a lesson and the missing information when you fill in portions of the problem. 4-00
  178. Trigonometry Basics (Thinkquest Team 20991)
      Provides basic trigonometry tutorials for ratios, rotations, radians, graphs and graphing, cofunctions, Pythagorean and quotient identities. Also includes a quiz. 5-00
  179. Trigonometry Identities (Thinkquest Team 20991)
      Provides examples to teach about cosine, sine, tangent, and double identities, as well as proving identities. Also includes a quiz. 5-00
  180. Whole Number Operations (ProTeacher)
      Provides over two dozen sources of lessons. Many include worksheets. 12-99